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Microwave assisted extraction for the determination of ethyl glucuronide in urine by gas chromatography-mass spectrometry

✍ Scribed by Iván Álvarez Freire; Ana María Bermejo Barrera; Purificación Cid Silva; María Jesús Tabernero Duque; Purificación Fernández Gómez; Patricia López Eijo

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
141 KB
Volume
28
Category
Article
ISSN
0260-437X

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✦ Synopsis

Abstract

Alcohol is the most frequently abused ‘addictive substance’ that causes serious social problems throughout the world; thus alcoholism is of particular interest in clinical and forensic medicine. Ethyl glucuronide (EtG) is a marker of recent alcohol consumption that detects alcohol use reliably over a definite time period. The present paper describes a new method for the determination of EtG in urine. It was based both on microwave assisted extraction (MAE) to extract the analyte from urine samples, and gas chromatography‐mass spectrometry (GC‐MS) to identify and quantify the EtG in selected ion monitoring (SIM) mode. The method was applied to 33 urine samples from alcohol users, obtaining positive results in all cases. It was fully validated including a linear range (0.1–100 µg ml^−1^) and the main precision parameters. In summary, the use of microwave assisted extraction turned out to be a substantially simpler, faster and more sensitive procedure than any other conventional sample preparations. Copyright © 2008 John Wiley & Sons, Ltd.

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