Gas chromatographic-mass spectrometric determination of urinary oxoacids using O-(2,3,4,5,6-pentafluorobenzyl)oxime-trimethylsilyl ester derivatization and cation-exchange chromatography

Seon Hwa Lee, Soon Ok Kim, Bong Chul Chung

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

We introduced a new combined method to isolate, purify and quantify oxoacids in human urine. Preparation of O-(2,3,4,5,6-pentafluorobenzyl) oximes of oxoacids at pH 2 to 3 was followed by cation-exchange column chromatography for removing the biological interferences. The effluent with water was extracted with ethyl acetate and the oxoacids were quantitatively converted into their trimethylsilyl derivatives for detection by gas chromatography-mass spectrometry. Good quality control data were obtained through precision and accuracy tests. Analytical recoveries (53.5~99.8%) were quantitative for a wide variety of oxoacids. This method was used for the measurement of 18 oxoacids in the urine of healthy volunteers. Copyright (C) 1998 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Chromatography B: Biomedical Applications
Volume719
Issue number1-2
DOIs
Publication statusPublished - 1998 Nov 20
Externally publishedYes

Keywords

  • Derivatization, GC-MS
  • O-PFBOximes
  • Oxoacids
  • TMS-ester

ASJC Scopus subject areas

  • Chemistry(all)

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