Stabilization of glutathione in urine and plasma: Relevance to urinary metal excretion studies

K. M. Mulder, P. J. Kostyniak

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The present studies demonstrate the instability of glutathione (GS) in urine and plasma and illustrate the importance of developing procedures to stabilize GS in biological fluids. The rapid loss of urinary GSH was not prevented by inhibition of γ-glutamyltranspeptidas (γ-GTP) with L-(αS,5S)-α-amino-3-chloro-4,5-dihydro-5-isoxazoleacetic acid (AT-125), by EDTA, or by sodium citrate. GS in urine could be stabilized for extended periods of time by acidification of samples immediately after collection. In order to accurately measure urine and plasma GS concentrations, samples were analyzed by a known additions technique. The relevance of these analytical procedures to metal excretion studies is discussed.

Original languageEnglish (US)
Pages (from-to)31-35
Number of pages5
JournalJournal of Analytical Toxicology
Volume9
Issue number1
DOIs
StatePublished - Jan 1 1985

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Environmental Chemistry
  • Toxicology
  • Health, Toxicology and Mutagenesis
  • Chemical Health and Safety

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