Abstract
In this work, accurate MS-based methods for quantitative profiling of nucleotides, nucleosides, and nucleobases in yeast extracts used as additives in animal feedstuff are presented. Reversed-phase chromatography utilizing a stationary phase compatible with 100 % aqueous mobile phases resulted in superior analytical figures of merit than HILIC or ion-pair reversed-phase separation. The novel separation method was combined with both molecular and elemental mass spectrometry. By use of RP–LC–MS–MS, excellent limits of detection <1 μmol L−1 could be obtained for all the compounds investigated. The elemental speciation analysis approach enabled determination of nucleotides by phosphorus detection. Sensitivity of LC–ICP–MS was 1–2 orders of magnitude lower than that of LC–MS–MS. Quantitative analysis of yeast products using complementary MS detection furnished values in good agreement.
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Abbreviations
- ACN:
-
Acetonitrile
- ADP:
-
Adenosine diphosphate
- AMP:
-
Adenosine monophosphate
- As:
-
Adenosine
- ATP:
-
Adenosine triphosphate
- Cd:
-
Cytidine
- CE:
-
Capillary electrophoresis
- CMP:
-
Cytidine monophosphate
- DNA:
-
Deoxyribonucleic acid
- DRC-QMS:
-
Dynamic reaction cell–quadrupole mass spectrometry
- ESI:
-
Electrospray ionization
- FV:
-
Fragmentor voltage
- GMP:
-
Guanosine monophosphate
- Gs:
-
Guanosine
- HILIC:
-
Hydrophilic-interaction liquid chromatography
- HPLC:
-
High-performance liquid chromatography
- IC:
-
Ion chromatography
- ICP:
-
Inductively coupled plasma
- IMP:
-
Inosine monophosphate
- IP:
-
Ion pair
- IS:
-
Internal standard
- Is:
-
Inosine
- k′:
-
Capacity factor
- LC:
-
Liquid chromatography
- LOD:
-
Limit of detection
- MeOH:
-
Methanol
- MRM:
-
Multiple reaction monitoring
- MS-MS:
-
Tandem mass spectrometry
- N:
-
Number of theoretical plates
- NDP:
-
Nucleoside diphosphate
- NMP:
-
Nucleoside monophosphate
- NTP:
-
Nucleoside triphosphate
- RP:
-
Reversed phase
- tR:
-
Retention time
- Ud:
-
Uridine
- UMP:
-
Uridine monophosphate
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Acknowledgements
This work was supported by the Biomin B.R.A.I.N program and by the Austrian Research Promotion Agency FFG (FHplus projekt METORGANIC).
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Stefan Neubauer and Ariana Rugova contributed equally
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Neubauer, S., Rugova, A., Chu, D.B. et al. Mass spectrometry based analysis of nucleotides, nucleosides, and nucleobases—application to feed supplements. Anal Bioanal Chem 404, 799–808 (2012). https://doi.org/10.1007/s00216-012-6170-9
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DOI: https://doi.org/10.1007/s00216-012-6170-9