Peer-reviewed Publications:


Spyksma, E.E.; Alexandridou, A.; Mai, K.; Volmer, D.A.; Stokes, C.S. An Overview of Different Vitamin D Compounds in the Setting of Adiposity. Nutrients 2024, 16, 231.



Alexandridou A , Schorr P, Volmer DA. Comparing derivatization reagents for quantitative LC-MS/MS analysis of a variety of vitamin D metabolites. Anal Bioanal Chem 2023,

doi: 10.1007/s00216-023-04753-0


Alexandridou A , Volmer DA. 2-fluoro-1-methylpyridinium p-toluene sulfonate: a new LC-MS/MS derivatization reagent for vitamin D metabolites. J Lipid res 2023

doi: 10.1016/j.jlr.2023.100409


van Wasen S, You Y, Beck S, Riedel J, Volmer DA. Miniaturized protein Digestion Using Acoustic Levitation with Online High Resolution Mass Spectrometry. Anal Chem 2023, 95, 8, 4190-4195.

doi: 10.1021/acs.analchem.2c05334


Letourneau DR, August DD, Volmer DA. New algorithms demonstrate untargeted detection of chemically meaningful changing units and formula assignment for HRMS data of polymeric mixtures in the open-source. J. Cheminformatics 2023, 15, 1-13


Ge J, Qi Y, Yao W,  Yuan D, Hu Q, Ma C, Volmer DA,  Liu CQ. Identification of Trace Components in Sauce-Flavor Baijiu by High-Resolution Mass Spectrometry. Molecules 2023, 28, 3, 1273


Yao W ,Ge J,  Hu Q,  Ma J, Yuan D, Fu X, Qi Y, Volmer DA. An advanced LC–MS/MS protocol for simultaneous detection of pharmaceuticals and personal care products in the environment.
Rapid Commun in Mass Spectrom.
2023, 37 (1), e9397      

Alexandridou A , Volmer DA. Stability of sample extracts of vitamin D3 metabolites after chemical
derivatization for LC–MS/MS analysis. Anal Bioanal Chem 2023, 415 (2), 327-333         

Letourneau DR , Volmer DA. Mass spectrometry‐based methods for the advanced characterization and
structural analysis of lignin: A review. Mass Spec Rev 2023, 42 (1), 144-188    





van Wasen S, You Y, Beck S, Riedel J, Volmer DA. Laser Ablation Secondary Electrospray Ionization for In Situ Mass Spectrometric Interrogation of Acoustically-Leviated Droplets. Anal Chem 2022, 94, 16992-16996. doi: 10.1021/acs.analchem.2c03800


Hu Q , Ge J , Yi Y, Ma C , Qi Y , Volmer DA. Fractionation and characterization of dissolved organic matter using solid‐phase extraction followed by Fourier transform ion cyclotron resonance mass spectrometry with electrospray, atmospheric pressure photoionization, and laser desorption ionization. Rapid Commun in Mass Spectrom 2022, 36 (19), e9364


Ge J , Qi Y, Li C, Ma J, Yi Y, Hu Q, Mostofa KMG, Volmer DA, Li SL. Fluorescence and molecular signatures of dissolved organic matter to monitor and assess its multiple sources from a polluted river in the farming-pastoral ecotone of northern China. Sci Total Environ 2022, 837, 154575


Qi Y, Xie Q, Wang J-J, Ding He D, Bao H, Fu Q-L, Su S, Sheng M, Li S-L, Volmer DA, Wu F,
Jiang G, Liu C-Q, Fu P. Deciphering dissolved organic matter by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS): from bulk to fractions and individuals. Carbon Research 2022, 1 (1), 3.


Y Qi, P Fu, DA Volmer. Analysis of natural organic matter via fourier transform ion cyclotron resonance mass spectrometry: an overview of recent non‐petroleum applications. Mass Spec Rev 2022, 41 (5), 647-661; 


Alexandridou A, Volmer DA. Sample techniques for extraction of vitamin D metabolites from non-conventional biological sample matrices prior to LC-MS/Ms analysis. Anal Bioanal Chem 2022, 414, 4613-4632.


Letourneau DR, Volmer DA. Constellation: An Open-Source Web Application for Unsupervised Systematic Trend Detection in High-Resolution Mass Spectrometry Data. J Am Soc Mass Spectrom. 2022, 33(2), 382-389. doi: 10.1021/jasms.1c00371


Haris A, Lam YPY, Wootton CA, Theisen A, Marzullo BP, Schorr P, Volmer DA, O'Connor PB. Differentiation of Dihydroxylated Vitamin D3 Isomers Using Tandem Mass Spectrometry. J. Am. Soc. Mass Spectrom 2022336, 1022-1030. doi: 10.1021/jasms.2c00085





Alexandridou A, Schorr P, Stokes CS, Volmer DA. Analysis of vitamin D metabolic markers by mass spectrometry: Recent progress regarding the "gold standard" method and integration into clinical practice. Mass Spectrom Rev 2021, 1-41. doi: 10.1002/mas.21768


Letourneau DR, Volmer DA. Mass spectrometry-based methods for the advanced characterization and structural analysis of lignin: A review. Mass Spec Rev. 2021, 1-45 . doi: 10.1002/mas.21716


Beck S. Fragmentation behavior of EDTA complexes under differentactivation conditions. J. Mass Spectrom., 2021, 56(7), e4775. doi: 10.1002/jms.4775


Schorr, P, Kovačević B, Volmer DA. Overestimation of 3α- Over 3β -25-Hydroxyvitamin D3 Levels in Serum: A Mechanistic Rationale for the Different Mass Spectral Properties of the Vitamin D Epimers. J. Am. Soc. Mass Spectrom. 2021, 32, 1116–1125. doi: 10.1021/jasms.1c00054


Misra BB, Volmer DA. Metabolomics in India. Anal Sci Adv 2021, 2 (11-12), 495-496.     


Reda B, Hollemeyer K, Trautmann S, Volmer DA, Hannig M. First insights into chlorhexidine retention in the oral cavity after application of different regimens. Clin Oral Investig. 2021, 25(11):6109-6118. doi.10.1007/s00784-021-03910-y   

Qi Y, Ma C, Chen S, Ge J, Hu Q, Li S-L, Volmer DA, Fu P. Online liquid chromatography and FT-ICR MS enable advanced separation and profiling of organosulfates in dissolved organic matter. ACS ES&T Water 2021, 1(8), 1975-1982.

Ge J, Ma C, Qi Y, Wang X, Wang W, Hu M, Hu Q, Yi Y-B, Shi D, Yue F‐J, Li S‐L , Volmer DA. Quadrupole detection FT‐ICR mass spectrometry offers deep profiling of residue oil: A systematic comparison of 2ω 7 Tesla versus 15 Tesla instruments. Analyt Sci Adv 2021, 2 (5-6), 272-278.  doi.10.1002/ansa.202000123


van Wasen S, You Y, Beck S, Riedel J, Volmer DA. Quantitative analysis of pharmaceutical drugs using a combination of acoustic levitation and high resolution mass spectrometry. Anal Chem 2021, 93 (15), 6019-6024.  doi.10.1021/acs.analchem.1c00762    




Li Z, Zhang P, Pyttlik A, Kraus T, Volmer DA. Influence of core size and capping ligand of gold nanoparticles on the desorption/ionization efficiency of small biomolecules in AP-SALDI-MS. Anal Sci Adv. 2020; 1:210–220. doi: 10.1002/ansa.202000002


Qi Y, Fu P, Li S, Ma C, Liu C, Volmer DA. Assessing molecular diversity of lignin products by various ionization techniques and high-resolution mass spectrometry. Sci Tot Environ. 2020; 713:136573. doi: 10.1016/j.scitotenv.2020.136573.


Qi Y, Fu P, Volmer DA. Analysis of natural organic matter via Fourier transform ion cyclotron resonance mass spectrometry: An overview of recent non-petroleum applications. Mass Spectrom Rev. 2020, 41, 647–661. doi: 10.1002/mas.21634


Reda B, Hollemeyer K, Trautmann S, Hannig M, Volmer DA. Determination of chlorhexidine retention in different oral sites using matrix-assisted laser desorption/ionization-time of flight mass spectrometry. Arch Oral Biol. 2020; 110:104623. doi: 10.1016/j.archoralbio.2019.104623.





Liu Z, Zhang P, Kister T, Kraus T, Volmer DA. Ultrathin Homogenous AuNP Monolayers as Tunable Functional Substrates for Surface-Assisted Laser Desorption/Ionization of Small Biomolecules
J Am Soc Mass Spectrom 2019, 31 (1), 47-57. doi:10.1021/jasms.9b00038 


Li Z, Zhang P, Volmer DA. A simple MALDI target plate with channel design to improve detection sensitivity and reproducibility for quantitative analysis of biomolecules. J Mass Spectrom. 2019; 54(11):877-884. doi: 10.1002/jms.4447.


Qi Y, Volmer DA. Chemical diversity of lignin degradation products revealed by matrix-optimized MALDI mass spectrometry. Anal Bioanal Chem. 2019. doi: 10.1007/s00216-019-01984-y.


Schorr P, Volmer DA. Using differential ion mobility spectrometry to perform class-specific ion-molecule reactions of 4-quinolones with selected chemical reagents. Anal Bioanal Chem. 2019.

doi: 10.1007/s00216-019-01789-z.


Volmer DA. 1st European Mass Spectrometry Conference (EMSC). Rapid Commun Mass Spectrom. 2019; 33(S1):1. doi: 10.1002/rcm.8360.


Rzagalinski I, Hainz N, Meier C, Tschernig T, Volmer DA. Spatial and molecular changes of mouse brain metabolism in response to immunomodulatory treatment with  teriflunomide as visualized by MALDI-MSI. Anal Bioanal Chem. 2019; 411(2):353-365. doi: 10.1007/s00216-018-1444-5. 




Rzagalinski I, Kovačević B, Hainz N, Meier C, Tschernig T, Volmer DA. Toward Higher Sensitivity in Quantitative MALDI Imaging Mass Spectrometry of CNS Drugs Using a Nonpolar Matrix. Anal Chem. 2018, 90(21):12592-12600. doi: 10.1021/acs.analchem.8b02740.


Qi Y, Volmer DA. Rapid mass spectral fingerprinting of complex mixtures of decomposed lignin: Data-processing methods for high-resolution full-scan mass spectra. Rapid Commun Mass Spectrom. 2018. doi: 10.1002/rcm.8254. 


Busch L, Mougiakakos D, Büttner-Herold M, Müller MJ, Volmer DA, Bach C, Fabri  M, Bittenbring JT, Neumann F, Boxhammer R, Nolting J, Bisht S, Böttcher M, Jitschin S, Hoffmann MH, Balzer H, Beier F, Gezer D, Dudziak D, Gelse K, Hennig FF, Pallasch CP, Spriewald B, Mackensen A, Bruns H. Lenalidomide enhances MOR202-dependent macrophage-mediated effector functions via the vitamin D pathway. Leukemia. 2018 Nov;32(11):2445-2458. doi: 10.1038/s41375-018-0114-0.


Rauber D, Dier TKF, Volmer DA, Hempelmann R. Electrochemical lignin degradation in ionic liquids on ternary mixed metal electrodes. Z Phys Chem. 2017 232(2):189-207.


Qi Y, Müller M, Stokes CS, Volmer DA. Rapid Quantification of 25-Hydroxyvitamin D(3) in Human Serum by Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry. J Am Soc Mass Spectrom. 2018 Jul;29(7):1456-1462. doi: 10.1007/s13361-018-1956-4. 


Rzagalinski I, Hainz N, Meier C, Tschernig T, Volmer DA. MALDI Mass Spectral Imaging of Bile Acids Observed as Deprotonated Molecules and Proton-Bound Dimers  from Mouse Liver Sections. J Am Soc Mass Spectrom. 2018 Apr;29(4):711-722. doi: 10.1007/s13361-017-1886-6.


Stokes CS, Lammert F, Volmer DA. Analytical Methods for Quantification of Vitamin D and Implications for Research and Clinical Practice. Anticancer Res. 2018 Feb;38(2):1137-1144. 


Thevis M, Volmer DA. Mass spectrometric studies on selective androgen receptor modulators (SARMs) using electron ionization and electrospray ionization/collision-induced dissociation. Eur J Mass Spectrom (Chichester). 2018 Feb;24(1):145-156. doi: 10.1177/1469066717731228. 


Bury D, Belov VN, Qi Y, Hayen H, Volmer DA, Brüning T, Koch HM. Determination of Urinary Metabolites of the Emerging UV Filter Octocrylene by Online-SPE-LC-MS/MS. Anal Chem. 2018 Jan 2;90(1):944-951. doi: 10.1021/acs.analchem.7b03996. 




Crawford EA, Gerbig S, Spengler B, Volmer DA. Rapid fingerprinting of lignin  by ambient ionization high resolution mass spectrometry and simplified data mining. Anal Chim Acta. 2017 Nov 22;994:38-48. doi: 10.1016/j.aca.2017.09.012.


Qi Y, Müller MJ, Volmer DA. Activation of Reactive MALDI Adduct Ions Enables  Differentiation of Dihydroxylated Vitamin D Isomers. J Am Soc Mass Spectrom. 2017 Dec;28(12):2532-2537. doi: 10.1007/s13361-017-1775-z.


Volmer DA, Curbani L, Parker T, Garcia J, Schultz L, Borges EM. Determination of Titratable Acidity in Wine using Potentiometric, Conductometric, and Photometric Methods, J Chem Educ. 2017, 94(9): 1296-302. doi: DOI: 10.1021/acs.jchemed.6b00891


Dier TKF, Rauber R, Jauch J, Hempelmann R , Volmer DA. Novel Mixed-Mode Stationary Phases for Chromatographic Separation of Complex Mixtures of Decomposed Lignin, Chem Select. 2017 2:779-786.


Dier TKF, Rauber D, Durneata D, Hempelmann R, Volmer DA. Sustainable Electrochemical Depolymerization of Lignin in Reusable Ionic Liquids. Sci Rep. 2017 Jul 11;7(1):5041. doi: 10.1038/s41598-017-05316-x. 


Baune M, Qi Y, Scholz K, Volmer DA, Hayen H. Structural characterization of pyoverdines produced by Pseudomonas putida KT2440 and Pseudomonas taiwanensis VLB120. Biometals. 2017 Aug;30(4):589-597. doi: 10.1007/s10534-017-0029-7. 


Dier TKF, Fleckenstein M, Militz H, Volmer DA. Exploring the potential of high resolution mass spectrometry for the investigation of lignin-derived phenol  substitutes in phenolic resin syntheses. Anal Bioanal Chem. 2017 May;409(13):3441-3451. doi: 10.1007/s00216-017-0282-1. 


Rauber D, Heib F, Dier TKF, Volmer DA, Hempelmann R, Schmitt M. On the Physicochemical and Surface Properties of 1-Alkyl 3-Methylimidazolium Bis (Nonafluorobutylsulfonyl)Imide Ionic Liquids. Coll Surf A. 2017 529:169-77. 


Müller MJ, Stokes CS, Volmer DA. Quantification of the 3α and 3β epimers of 25-hydroxyvitamin D(3) in dried blood spots by LC-MS/MS using artificial whole blood calibration and chemical derivatization. Talanta. 2017 Apr 1;165:398-404. doi: 10.1016/j.talanta.2016.12.081. 


Müller MJ, Bruns H, Volmer DA. Direct aqueous measurement of 25-hydroxyvitamin D levels in a cellular environment by LC-MS/MS using the novel  chemical derivatization reagent MDBP. Anal Bioanal Chem. 2017 Apr;409(10):2705-2714. doi: 10.1007/s00216-017-0215-z. 


Qi Y, Volmer DA. Mass Spectrometric Analysis of Cyclic Peptides. In Cyclic Peptides, Köhnke J, Naismith J, van der Donk W (Eds). Royal Society of Chemistry, 2017, 255-279. ISBN: 978-1-78262-528-5.


Qi Y, Luo R, Schrader W, Volmer DA. Application of Phase Correction to Improve the Characterization of Photooxidation Products of Lignin Using 7 Tesla Fourier-transform Ion Cyclotron Resonance Mass Spectrometry. Facets. 2017 2:461-75.


Kattner L, Volmer DA, Synthesis of Rare Vitamin D Metabolites and Assaying Their Distribution in Human Serum by Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) as a New Tool for Disease Diagnosis and Risk Prediction. In A Critical Evaluation of Vitamin D - Basic Overview. Gowder S (Ed). InTech, 2017, ISBN: 978-953-51-3084-0.


Fukuyama T, Ganchingco JR, Mishra SK, Olivry T, Rzagalinski I, Volmer DA, Bäumer W. Janus kinase inhibitors display broad anti-itch properties: A possible  link through the TRPV1 receptor. J Allergy Clin Immunol. 2017 Jul;140(1):306-309.e3. doi: 10.1016/j.jaci.2016.12.960. 


Rzagalinski I, Volmer DA. Quantification of low molecular weight compounds by MALDI imaging mass spectrometry - A tutorial review. Biochim Biophys Acta Proteins Proteom. 2017 Jul;1865(7):726-739. doi: 10.1016/j.bbapap.2016.12.011.




Stokes CS, Volmer DA. Assessment of 3-epi-25-hydroxyvitamin D levels during cholecalciferol supplementation in adults with chronic liver diseases. Appl Physiol Nutr Metab. 2016 Dec;41(12):1311-1317. 


Grimm MO, Regner L, Mett J, Stahlmann CP, Schorr P, Nelke C, Streidenberger O, Stoetzel H, Winkler J, Zaidan SR, Thiel A, Endres K, Grimm HS, Volmer DA, Hartmann T. Tocotrienol Affects Oxidative Stress, Cholesterol Homeostasis and the Amyloidogenic Pathway in Neuroblastoma Cells: Consequences for Alzheimer's Disease. Int J Mol Sci. 2016 Oct 29;17(11). pii: E1809. 


Qi Y, Hempelmann R, Volmer DA. Shedding light on the structures of lignin compounds: photo-oxidation under artificial UV light and characterization by high resolution mass spectrometry. Anal Bioanal Chem. 2016 Nov;408(28):8203-8210.


Borges EM, Volmer DA, Brandelero E, Gelinski JLEM, Gallimberti M, Barbosa F. Monitoring the  authenticity of organic grape juice via chemometric analysis of elemental data. Food Anal Methods. 2016 Feb; 9(2):362-9.


Volmer DA, Stokes CS. Analysis of Vitamin D Metabolites by Mass Spectrometry”. In Encyclopedia of Lipidomics”. Wenk MR (Ed). Springer, Springer, Dordrecht, 2016. doi:10.1007/978-94-007-7864-1_107-1


Volmer DA, Stokes CS. How to prepare a manuscript fit-for-purpose for submission and avoid getting a 'desk-reject'. Rapid Commun Mass Spectrom. 2016 Dec 30;30(24):2573-2576. doi: 10.1002/rcm.7746. 


Crawford EA, Esen C, Volmer DA. Real Time Monitoring of Containerless Microreactions in Acoustically Levitated Droplets via Ambient Ionization Mass Spectrometry. Anal Chem. 2016 Sep 6;88(17):8396-403. doi: 10.1021/acs.analchem.6b01519.


Qi Y, Hempelmann R, Volmer DA. Two-dimensional mass defect matrix plots for mapping genealogical links in mixtures of lignin depolymerisation products. Anal  Bioanal Chem. 2016 Jul;408(18):4835-43. doi: 10.1007/s00216-016-9598-5. 


Geib T, Sleno L, Hall RA, Stokes CS, Volmer DA. Triple Quadrupole Versus High Resolution Quadrupole-Time-of-Flight Mass Spectrometry for Quantitative LC-MS/MS Analysis of 25 Hydroxyvitamin D in Human Serum. J Am Soc Mass Spectrom. 2016 Aug;27(8):1404-10. doi: 10.1007/s13361-016-1412-2. 


Silina YE, Fink-Straube C, Hanselmann RG, Peuschel H, Volmer DA. p-Coumaric acid, a novel and effective biomarker for quantifying hypoxic stress by HILIC-ESI-MS. J Chromatogr B 2016 May 1;1020:6-13. doi: 10.1016/j.jchromb.2016.03.005. 


Müller MJ, Stokes CS, Lammert F, Volmer DA. Chemotyping the distribution of vitamin D metabolites in human serum. Sci Rep. 2016 Feb 11;6:21080. doi: 10.1038/srep21080.


Qi Y, Volmer DA. Structural analysis of small to medium-sized molecules by mass spectrometry after electron-ion fragmentation (ExD) reactions. Analyst. 2016 Feb 7;141(3):794-806. doi: 10.1039/c5an02171e.


Duncan KD, Volmer DA, Gill CG, Krogh ET. Rapid Screening of Carboxylic Acids  from Waste and Surface Waters by ESI-MS/MS Using Barium Ion Chemistry and On-Line Membrane Sampling. J Am Soc Mass Spectrom. 2016 Mar;27(3):443-50. doi: 10.1007/s13361-015-1311-y.


Dier TK, Egele K, Fossog V, Hempelmann R, Volmer DA. Enhanced Mass Defect Filtering To Simplify and Classify Complex Mixtures of Lignin Degradation Products. Anal Chem. 2016 Jan 19;88(2):1328-35. doi: 10.1021/acs.analchem.5b03790. 


Volmer DA, Stokes CS. How to Prepare a Manuscript Fit-for-purpose for Submission and Avoid Getting a "Desk-Reject". Rapid Commun Mass Spectrom. 2016 30: 2573-6.


Huynh AM, Menges J, Vester M, Dier T, Huch V, Volmer DA, Jung G. Monofluorination and Trifluoromethylation of BODIPY Dyes for Prolonged Single-Molecule Detection. Chemphyschem. 2016 Feb 3;17(3):433-42. doi: 10.1002/cphc.201500869.


Qi Y, Hayen H, Volmer DA. Characterization of the iron-binding properties of  pyoverdine using electron-capture dissociation-tandem mass spectrometry. Biometals. 2016 Feb;29(1):53-60. doi: 10.1007/s10534-015-9895-z.




Qi Y, Volmer DA. Electron-capture dissociation for investigating host/guest complexes of 18-crown-6-ether and peptides. Rapid Commun Mass Spectrom. 2015 Dec 15;29(23):2316-8. doi: 10.1002/rcm.7399. 


Silina YE, haben H, Volmer DA. Analysis of fatty acids and triglycerides by Pd nanoparticle-assisted laser desorption/ionization mass spectrometry. Anal Methods. 2015 7:3701-07. doi: 10.1039/C5AY00705D.


Borges EM, Gallimberti M, de Souza VC, Volmer DA, Batista BL, Barbosa RM, Campiglia AD, Barbosa F. The use of chemometric techniques and macro and micro element levels for verifying the authenticity of organic eggs. Anal Methods. 2015 7:2577-84. doi: 10.1039/C4AY02986K.


Kern F, Dier TK, Khatri Y, Ewen KM, Jacquot JP, Volmer DA, Bernhardt R. Highly Efficient CYP167A1 (EpoK) dependent Epothilone B Formation and Production of 7-Ketone Epothilone D as a New Epothilone Derivative. Sci Rep. 2015 Oct 8;5:14881. doi: 10.1038/srep14881. 


Qi Y, Volmer DA. Electron-based fragmentation methods in mass spectrometry: An overview. Mass Spectrom Rev. 2017 Jan;36(1):4-15. doi: 10.1002/mas.21482. 


Qi Y, Geib T, Huynh AM, Jung G, Volmer DA. Fragmentation patterns of boron-dipyrromethene (BODIPY) dyes by electrospray ionization high-resolution tandem mass spectrometry. Rapid Commun Mass Spectrom. 2015 May 15;29(9):885-90. doi: 10.1002/rcm.7179. 


Volmer DA, Qi Y. Letter: β-Cyclodextrin affects the formation of isomerization products during peptide deamidation. Eur J Mass Spectrom. 2015;21(4):701-5. doi: 10.1255/ejms.1385. 


Stokes CS, Grünhage F, Baus C, Volmer DA, Wagenpfeil S, Riemenschneider M, Lammert F. Vitamin D supplementation reduces depressive symptoms in patients with chronic liver disease. Clin Nutr. 2016 Aug;35(4):950-7. doi: 10.1016/j.clnu.2015.07.004.


Fukuyama T, Tschernig T, Qi Y, Volmer DA, Bäumer W. Aggression behaviour induced by oral administration of the Janus-kinase inhibitor tofacitinib, but not oclacitinib, under stressful conditions. Eur J Pharmacol. 2015 Oct 5;764:278-82. doi: 10.1016/j.ejphar.2015.06.060. 


Müller MJ, Volmer DA. Mass spectrometric profiling of vitamin D metabolites beyond 25-hydroxyvitamin D. Clin Chem. 2015 Aug;61(8):1033-48. doi: 10.1373/clinchem.2015.241430.


Kiss FM, Schmitz D, Zapp J, Dier TK, Volmer DA, Bernhardt R. Comparison of CYP106A1 and CYP106A2 from Bacillus megaterium - identification of a novel 11-oxidase activity. Appl Microbiol Biotechnol. 2015 Oct;99(20):8495-514. doi: 10.1007/s00253-015-6563-8.


Qi Y, Geib T, Volmer DA. Determining the Binding Sites of β-Cyclodextrin and  Peptides by Electron-Capture Dissociation High Resolution Tandem Mass Spectrometry. J Am Soc Mass Spectrom. 2015 Jul;26(7):1143-9. doi: 10.1007/s13361-015-1118-x.


Mirabelli MF, Coviello G, Volmer DA. Determining fatty acids by desorption/ionization mass spectrometry using thin-layer chromatography substrates. Anal Bioanal Chem. 2015 Jun;407(16):4513-22. doi: 10.1007/s00216-015-8630-5.


Silina YE, Koch M, Volmer DA. Influence of surface melting effects and availability of reagent ions on LDI-MS efficiency after UV laser irradiation of Pd nanostructures. J Mass Spectrom. 2015 Mar;50(3):578-85. doi: 10.1002/jms.3564.


Qi Y, Hainz N, Tschernig T, Meier C, Volmer DA. Differential distribution of  probenecid as detected by on-tissue mass spectrometry. Cell Tissue Res. 2015 May;360(2):427-9. doi: 10.1007/s00441-015-2153-4. Epub 2015 Mar 12. 


Bylda C, Thiele R, Kobold U, Volmer DA. Simultaneous quantification of digoxin, digitoxin, and their metabolites in serum using high performance liquid  chromatography-tandem mass spectrometry. Drug Test Anal. 2015 Oct;7(10):937-46. doi: 10.1002/dta.1781. 


Qi Y, Rosso L, Sedan D, Giannuzzi L, Andrinolo D, Volmer DA. Seven new microcystin variants discovered from a native Microcystis aeruginosa strain--unambiguous assignment of product ions by tandem mass spectrometry. Rapid Commun Mass Spectrom. 2015 Jan 30;29(2):220-4. doi: 10.1002/rcm.7098. 


Borges EM, Volmer DA. Silica, Hybrid Silica, Hydride Silica and Non-Silica Stationary Phases for Liquid Chromatography. Part II: Chemical and Thermal Stability. J Chromatogr Sci. 2015 Aug;53(7):1107-22. doi: 10.1093/chromsci/bmu173. Epub 2015 Jan 21. 


Geib T, Meier F, Schorr P, Lammert F, Stokes CS, Volmer DA. A simple micro-extraction plate assay for automated LC-MS/MS analysis of human serum 25-hydroxyvitamin D levels. J Mass Spectrom. 2015 Jan;50(1):275-9. doi: 10.1002/jms.3522.


Kiss FM, Schmitz D, Zapp J, Dier TK, Volmer DA, Bernhardt R. Comparison of CYP106A1 and

CYP106A2 from Bacillus megaterium - Identification of a Novel 11-Oxidase Activity, Appl Microbiol Biotechnol. 2015 99: 8495-8514.


Bylda C, Thiele R, Kobold U, Bujotzek A, Volmer DA. Rapid quantification of digitoxin and its metabolites using differential ion mobility spectrometry-tandem mass spectrometry. Anal Chem. 2015 Feb 17;87(4):2121-8. doi: 10.1021/ac503187z.


Wegener O, Harms G, Volmer DA, Hayen H. Structural characterization of a degradation product of rocuronium using nanoelectrospray-high resolution mass spectrometry. Drug Test Anal. 2015 Sep;7(9):773-9. doi: 10.1002/dta.1751. 


Silina YE, Koch M, Volmer DA. Impact of Analyte Ablation and Surface Acidity of Pd Nanoparticles on Efficiency of SurfaceAassisted Laser Desorption/Ionization Mass Spectrometry, Int J Mass Spectrom. 2015 387:24-30.


Qi Y, Geib T, Schorr P, Meier F, Volmer DA. On the isobaric space of 25-hydroxyvitamin D in human serum: potential for interferences in liquid chromatography/tandem mass spectrometry, systematic errors and accuracy issues. Rapid Commun Mass Spectrom. 2015 Jan 15;29(1):1-9. doi: 10.1002/rcm.7075. 


Silina YE, Kuchmenko TA, Volmer DA. Sorption of hydrophilic dyes on anodic aluminium oxide films and application to pH sensing. Analyst. 2015 Feb 7;140(3):771-8. doi: 10.1039/c4an00806e. 


Bylda C, Velichkova V, Bolle J, Thiele R, Kobold U, Volmer DA. Magnetic beads as an extraction medium for simultaneous quantification of acetaminophen and structurally related compounds in human serum. Drug Test Anal. 2015 Jun;7(6):457-66. doi: 10.1002/dta.1708. 


Volmer DA, Mendes LR, Stokes CS. Analysis of vitamin D metabolic markers by mass spectrometry: current techniques, limitations of the "gold standard" method, and anticipated future directions. Mass Spectrom Rev. 2015 Jan-Feb;34(1):2-23. doi: 10.1002/mas.21408. 




Kovačević B, Schorr P, Qi Y, Volmer DA. Decay mechanisms of protonated 4-quinolone antibiotics after electrospray ionization and ion activation. J Am Soc Mass Spectrom. 2014 Nov;25(11):1974-86. doi: 10.1007/s13361-014-0972-2.


Volmer DA, Principle of high resolution mass spectrometry. In Applications of high resolution mass spectrometry in drug discovery and development. Sleno L (Ed). Future Science, London 2014, 6-20.


Masoodi M, Volmer DA. Comprehensive quantitative determination of PUFA-related bioactive lipids for functional lipidomics using high-resolution mass spectrometry. Methods Mol Biol. 2014;1198:221-32. doi: 10.1007/978-1-4939-1258-2_14.


Wirtz M, Grüter A, Rebmann P, Dier T, Volmer DA, Huch V, Jung G. Two-color emissive probes for click reactions. Chem Commun (Camb). 2014 Oct 28;50(84):12694-7. doi: 10.1039/c4cc05288a. 


Volmer DA. Terms and acronyms that should be avoided in mass spectrometry publications. Rapid Commun Mass Spectrom. 2014 Sep 15;28(17):1853-4. doi: 10.1002/rcm.6979.


Bortoli S, de Oliveira Silva D, Krüger T, Dörr FA, Colepicolo P, Volmer DA, Pinto E. Growth and

Microcystin Production of a Brazilian Microcystis aeruginosa Strain (LTPNA 02) under Different Nutrient Conditions. Braz J Pharmcognosy 2014 24:389-98.


Volmer DA. Dr Leslie J. C. Bluck (1956-2014). Rapid Commun Mass Spectrom. 2014 Aug 15;28(15):1777-8. doi: 10.1002/rcm.6954. 


Auerbach D, Aspenleiter J, Volmer DA. Description of gas-phase ion/neutral interactions in  differential ion mobility spectrometry: CV prediction using calibration runs. J Am Soc Mass Spectrom. 2014 Sep;25(9):1610-21. doi: 10.1007/s13361-014-0934-8.


Silina YE, Koch M, Volmer DA. The role of physical and chemical properties of Pd nanostructured materials immobilized on inorganic carriers on ion formation in atmospheric pressure laser desorption/ionization mass spectrometry. J Mass Spectrom. 2014 Jun;49(6):468-80. doi: 10.1002/jms.3362. 


Volmer DA. Terms and accronyms that should be avoided in mass spectrometry publications. Rapid Commun Mass Spectrom. 2014 28:1777-8.


Bortoli S, Volmer DA. Account: characterization and identification of microcystins by mass spectrometry. Eur J Mass Spectrom. 2014;20(1):1-19. 


Qi Y, Bortoli S, Volmer DA. Detailed study of cyanobacterial microcystins using high performance tandem mass spectrometry. J Am Soc Mass Spectrom. 2014 Jul;25(7):1253-62. doi: 10.1007/s13361-014-0893-0. 


Silina YE, Meier F, Nebolsin VA, Koch M, Volmer DA. Novel galvanic nanostructures of Ag and Pd for efficient laser desorption/ionization of low molecular weight compounds. J Am Soc Mass Spectrom. 2014 May;25(5):841-51.


Bylda C, Thiele R, Kobold U, Volmer DA. Recent advances in sample preparation techniques to overcome difficulties encountered during quantitative analysis of small molecules from biofluids using LC-MS/MS. Analyst. 2014 May 21;139(10):2265-76. doi: 10.1039/c4an00094c. 


Gode D, Schmitt C, Engel M, Volmer DA. Screening Dyrk1A inhibitors by MALDI-QqQ mass spectrometry: systematic comparison to established radiometric, luminescence, and LC-UV-MS assays. Anal Bioanal Chem. 2014 May;406(12):2841-52. doi: 10.1007/s00216-014-7703-1. 




Silina YE, Volmer DA. Nanostructured solid substrates for efficient laser desorption/ionization mass spectrometry (LDI-MS) of low molecular weight compounds. Analyst. 2013 Dec 7;138(23):7053-65. doi: 10.1039/c3an01120h.


Bylda C, Thiele R, Kobold U, Volmer DA. Simultaneous quantification of acetaminophen and structurally related compounds in human serum and plasma. Drug  Test Anal. 2014 May;6(5):451-60. doi: 10.1002/dta.1527.


Gode D, Volmer DA. A novel magnet focusing plate for matrix-assisted laser desorption/ionization analysis of magnetic bead-bound analytes. Rapid Commun Mass Spectrom. 2013 May 15;27(9):1011-8. doi: 10.1002/rcm.6548. 


Borges EM, Volmer DA, Eberlin MN. Comprehensive Analysis of Ginkgo Tablets by Easy Ambient Sonic Spray Ionization Mass Spectrometry. Can J Chem. 2013 91:671-8.


Stokes CS, Volmer DA, Grünhage F, Lammert F. Vitamin D in chronic liver disease. Liver Int. 2013 Mar;33(3):338-52. doi: 10.1111/liv.12106. 


Gode D, Volmer DA. Lipid imaging by mass spectrometry - a review. Analyst. 2013 Mar 7;138(5):1289-315. doi: 10.1039/c2an36337b. 




Peifer S, Barduhn T, Zimmet S, Volmer DA, Heinzle E, Schneider K. Metabolic engineering of the purine biosynthetic pathway in Corynebacterium glutamicum results in increased intracellular pool sizes of IMP and hypoxanthine. Microb Cell Fact. 2012 Oct 24;11:138. doi: 10.1186/1475-2859-11-138.


Hochrath K, Krawczyk M, Goebel R, Langhirt M, Rathkolb B, Micklich K, Rozman  J, Horsch M, Beckers J, Klingenspor M, Fuchs H, Gailus-Durner V, Wolf E, Acalovschi M, Volmer DA, Hrabě de Angelis M, Lammert F. The hepatic phosphatidylcholine transporter ABCB4 as modulator of glucose homeostasis. FASEB  J. 2012 Dec;26(12):5081-91. doi: 10.1096/fj.12-209379. 


Peifer S, Schneider K, Nürenberg G, Volmer DA, Heinzle E. Quantitation of intracellular purine intermediates in different Corynebacteria using electrospray LC-MS/MS. Anal Bioanal Chem. 2012 Nov;404(8):2295-305. doi: 10.1007/s00216-012-6388-6.


Mittermüller M, Volmer DA. Micro- and nanostructures and their application in gas chromatography. Analyst. 2012 Jul 21;137(14):3195-201. doi: 10.1039/c2an35184f.


Gode D, Martin MM, Steiner F, Huber CG, Volmer DA. Rapid narrow band elution  for on-line SPE using a novel solvent plug injection technique. Anal Bioanal Chem. 2012 Aug;404(2):433-45. doi: 10.1007/s00216-012-6138-9.


Volmer DA. Selectivity Enhancements for Analysis of Biological Materials. Hyphenated Differential Ion Mobility-Mass Spectrometry. GIT Lab Fachz. 2012 12:855-7.


Iglesias J, Sleno L, Volmer DA. Isotopic labeling of metabolites in drug discovery applications. Curr Drug Metab. 2012 Nov;13(9):1213-25. 


Reichert E, Wintringer R, Volmer DA, Hempelmann R. Electro-catalytic oxidative cleavage of lignin in a protic ionic liquid. Phys Chem Chem Phys. 2012  Apr 21;14(15):5214-21. doi: 10.1039/c2cp23596j. 


Thevis M, Volmer DA. Recent instrumental progress in mass spectrometry: advancing resolution, accuracy, and speed of drug detection. Drug Test Anal. 2012 Mar-Apr;4(3-4):242-5. doi: 10.1002/dta.344. 


Bylda C, Leinenbach A, Thiele R, Kobold U, Volmer DA. Development of an electrospray LC-MS/MS method for quantification of Δ(9) -tetrahydrocannabinol and its main metabolite in oral fluid. Drug Test Anal. 2012 Jul-Aug;4(7-8):668-74. doi: 10.1002/dta.1334. 


Trevorrow P, Volmer DA. Dispelling the myths surrounding the Research Excellence Framework. Rapid Commun Mass Spectrom. 2012 Feb 29;26(4):399-402. doi: 10.1002/rcm.6133.




Dörr FA, Kovačevi B, Maksi ZB, Pinto E, Volmer DA. Intriguing differences in  the gas-phase dissociation behavior of protonated and deprotonated gonyautoxin epimers. J Am Soc Mass Spectrom. 2011 Nov;22(11):2011-20. doi: 10.1007/s13361-011-0223-8.


Nürenberg G, Volmer DA. The analytical determination of isoprenoid intermediates from the mevalonate pathway. Anal Bioanal Chem. 2012 Jan;402(2):671-85. doi: 10.1007/s00216-011-5262-2. 


Volmer DA. New structured abstracts for RCM. Rapid Commun Mass Spectrom. 2011 25:3201-2.


Dörr FA, Oliveira-Silva D, Lopes NP, Iglesias J, Volmer DA, Pinto E. Dissociation of deprotonated microcystin variants by collision-induced dissociation following electrospray ionization. Rapid Commun Mass Spectrom. 2011  Jul 30;25(14):1981-92. doi: 10.1002/rcm.5083. 


Volmer DA. Twenty-five years of RCM. Rapid Commun Mass Spectrom. 2011 Jan 15;25(1):1-2. doi: 10.1002/rcm.4885. 




Masoodi M, Eiden M, Koulman A, Spaner D, Volmer DA. Comprehensive lipidomics  analysis of bioactive lipids in complex regulatory networks. Anal Chem. 2010 Oct  1;82(19):8176-85. doi: 10.1021/ac1015563. 


Hooff GP, Patel N, Wood WG, Müller WE, Eckert GP, Volmer DA. A rapid and sensitive assay for determining human brain levels of farnesyl-(FPP) and geranylgeranylpyrophosphate (GGPP) and transferase activities using UHPLC-MS/MS.  Anal Bioanal Chem. 2010 Oct;398(4):1801-8. doi: 10.1007/s00216-010-4088-7. 


Ding S, Schoenmakers I, Jones K, Koulman A, Prentice A, Volmer DA. Quantitative determination of vitamin D metabolites in plasma using UHPLC-MS/MS.  Anal Bioanal Chem. 2010 Sep;398(2):779-89. doi: 10.1007/s00216-010-3993-0. 


Volmer DA. Prerequisites for supplying complementary high resolution mass spectrometry data in RCM publications. Rapid Commun Mass Spectrom. 2010 24:3499-3500.