An improved sample preparation procedure for analysis of carcinogenic ethyl carbamate (EC) in wine by
GC–MS–SIM is proposed. Differences over AOAC reference procedure were: (1) use of EC-d5 as internal
standard instead of less similar propyl carbamate; (2) extraction by diethyl ether instead of more toxic
dichloromethane, and (3) concentration by vacuum automated parallel evaporation instead of more time
and work consuming rotary evaporation. Mean recovery was 104.4%, intraday precision was 6.7%
(3.4 lg L1) and 1.7% (88.5 lg L1), regression coefficient was 0.999 in the linear working range of
3–89 lg L1, and limits of detection and quantification were 0.4 and 1.2 lg L1. Applicability was demonstrated
by analysis (in triplicate) of 5 wine samples. EC concentration ranged from 5.2 ± 0.2 to
29.4 ± 1.5 lg L1. The analytical method is selective, accurate, repeatable, linear, and has similar method
performance as the reference method along with the several mentioned advantages.
An improved sample preparation procedure for analysis of carcinogenic ethyl carbamate (EC) in wine byGC–MS–SIM is proposed. Differences over AOAC reference procedure were: (1) use of EC-d5 as internalstandard instead of less similar propyl carbamate; (2) extraction by diethyl ether instead of more toxicdichloromethane, and (3) concentration by vacuum automated parallel evaporation instead of more timeand work consuming rotary evaporation. Mean recovery was 104.4%, intraday precision was 6.7%(3.4 lg L1) and 1.7% (88.5 lg L1), regression coefficient was 0.999 in the linear working range of3–89 lg L1, and limits of detection and quantification were 0.4 and 1.2 lg L1. Applicability was demonstratedby analysis (in triplicate) of 5 wine samples. EC concentration ranged from 5.2 ± 0.2 to29.4 ± 1.5 lg L1. The analytical method is selective, accurate, repeatable, linear, and has similar methodperformance as the reference method along with the several mentioned advantages.
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