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Isotopic labelling of peptides and isotope ratio analysis using LC–ICP–MS: a preliminary study
- Source :
- Analytical and Bioanalytical Chemistry. 390:61-65
- Publication Year :
- 2007
- Publisher :
- Springer Science and Business Media LLC, 2007.
-
Abstract
- Bradykinin and substance P have been derivatised with cyclic diethylenetriaminepentaacetic anhydride (cDTPA) and subsequently labelled with natural and isotopically enriched Eu(3+). This enabled the detection and relative quantitation of the peptides using element-selective detection by high-performance liquid chromatography inductively coupled plasma mass spectrometry (LC-ICP-MS). Relative quantitation was achieved by differentially labelling two peptide sources, after derivatisation with cDTPA, using natural and enriched (151)Eu respectively. The (151)Eu:(153)Eu isotope ratio was measured and used to calculate the original peptide ratio. The measured ratios came within 5.2% of the known ratio. Derivatisation and chelation reactions were additionally confirmed using LC-ESI-MS.
- Subjects :
- chemistry.chemical_classification
Electrospray
Chemical ionization
Chromatography
Peptide
Substance P
Bradykinin
Mass spectrometry
Biochemistry
High-performance liquid chromatography
Mass Spectrometry
Analytical Chemistry
Europium
Isotopes
chemistry
Labelling
Quantitative analysis (chemistry)
Inductively coupled plasma mass spectrometry
Chromatography, Liquid
Subjects
Details
- ISSN :
- 16182650 and 16182642
- Volume :
- 390
- Database :
- OpenAIRE
- Journal :
- Analytical and Bioanalytical Chemistry
- Accession number :
- edsair.doi.dedup.....a449384aeca25e87cf019228816a4708