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Determination of chloral hydrate and its metabolites (trichloroethanol and trichloracetic acid) in human plasma and urine using electron capture gas chromatography
Author(s) -
Humbert L.,
Jacquemont M. C.,
Leroy E.,
Leclerc F.,
Houdret N.,
Lhermitte M.
Publication year - 1994
Publication title -
biomedical chromatography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 65
eISSN - 1099-0801
pISSN - 0269-3879
DOI - 10.1002/bmc.1130080604
Subject(s) - chemistry , chloral hydrate , chromatography , gas chromatography , urine , human plasma , electron capture , organic chemistry , biochemistry , pharmacology , ion , medicine
Capillary gas chromatography with electron capture detection is described for the quantification of chloral hydrate (CH) and is metabolites trichloroethanol (TCE) and trichloroacetic acid (TCA) in 0.1–1 mL of plasma samples. The method, with 2,2′‐dichloroethanol (DCE) as internal standard, involved extraction of chloral hydrate and trichloroethanol with diethyl ether and methylation of trichloroacetic acid with 3‐methyl‐1‐tolyltriazene (MTT), followed by diethyl ether extraction. The method has a detection limit of 5 ng/mL for CH and TCE and 10 ng/mL for TCA and also allows the determination of TCE‐glucuronide in 0.1–1 mL of plasma samples. It exhibits good linearity and precision. The method was applied to samples of plasma from a neonate after a single dose of 40 mg/kg of chloral hydrate and from an adult after a single dose of 6.25 mg/kg.