Direct determination of the ethanol metabolites ethyl glucuronide and ethyl sulfate in urine by liquid chromatography/electrospray tandem mass spectrometry

被引:61
|
作者
Politi, L [1 ]
Morini, L [1 ]
Groppi, A [1 ]
Poloni, V [1 ]
Pozzi, F [1 ]
Polettini, A [1 ]
机构
[1] Univ Pavia, Dept Legal Med & Publ Hlth, I-27100 Pavia, Italy
关键词
D O I
10.1002/rcm.1932
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A liquid chromatography/electrospray tandem mass spectrometry (LC/ESI-MS/MS) method for the determination in urine samples of two ethanol metabolites, ethyl glucuronide (EtG) and ethyl sulfate (EtS), was developed and validated. Pentadeuterated EtG was used as internal standard for both EtG and EtS. In addition to the surviving ions, two MS/MS reactions were monitored for each analyte, with the deprotonated molecule as precursor ion: m/z 221 -> 75, m/z 221 -> 85 (EtG), and nift 125 -> 97, m/z 125 -> 80 (EtS). Sample pretreatment, though very simple and rapid (1:50 water dilution and centrifugation of 50 mu L of urine), was found to contain the occurrence of matrix effects. The method was accurate and precise over the linear dynamic range (0.05-10 mg/L). The analytes were stable in frozen urine for at least 1 month. The assay was applied to several authentic urine samples from social drinkers and to alcoholic beverages. Copyright (c) 2005 John Wiley & Sons, Ltd.
引用
收藏
页码:1321 / 1331
页数:11
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