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论文类型：期刊论文

发表时间：2002-01-05

发表刊物：SENSORS AND ACTUATORS B-CHEMICAL

收录刊物：Scopus、SCIE、EI

卷号：81

期号：2-3

页面范围：218-222

ISSN号：0925-4005

关键字：trimethylamine vapor probe; piezoelectric quartz crystal; fish freshness; chitosan

摘要：A trimethylamine (TMA) vapor probe based on the sensitive membrane of chitosan, which encapsulated pimelic acid on piezoelectric quartz crystal has been prepared for the assay of fish freshness. The response of the probe to TMA is rapid and completely reversible at normal temperature and relatively high humidity. The probe has an exponential response to TMA in the concentration range of 5-200 ppm, and the relative standard deviations (R.S.D.) were less than 5% for repeated determinations of 50 ppm TMA within 6 months. The results of fish freshness assay were consistent with those obtained by other methods and the sensory test. (C) 2002 Elsevier Science B.V All rights reserved.