Early detection of microbial contamination in processed tomatoes by electronic nose
Early detection of microbial contamination in processed tomatoes by electronic nose
复制标题
DOI：
10.1016/j.foodcont.2008.11.006
复制
发表时间：
2009-10-01
期刊：
影响因子：
6
通讯作者：
Sberveglieri, G.
中科院分区：
文献类型：
--
作者：
Concina, I.;Falasconi, M.;Sberveglieri, G.
微生物污染很容易影响加工番茄，从而确定感官掺假和潜在的健康风险。为了保证食品安全和提高生产水平，迫切需要快速可靠地诊断腐败的创新技术，如电子鼻技术。在这项工作中，罐头去皮番茄人工腐败与不同种类的微生物植物群，然后分析了基于薄膜金属氧化物气体传感器的电子鼻。初步分析动态顶空气相色谱-质谱法显示显着差异的半定量挥发性化合物配置文件的腐败番茄样品后几个小时的污染，从而建议采用电子鼻的微生物存在的早期诊断。电子鼻确实能够揭示污染，即使在早期阶段，这取决于污染物的类型（例如酿酒酵母和大肠杆菌），并以良好的分类性能识别腐败的番茄样品。(C)2008爱思唯尔有限公司保留所有权利。
Microbial contamination can easily affect processed tomato, thus determining both organoleptic adulterations and potential health risks for customers. Innovative techniques for a rapid and reliable diagnose of spoilage, such as electronic nose technology, are highly requested in order to guarantee food safety and to improve production. In this work canned peeled tomatoes were artificially spoiled with different kinds of microbial flora and then were analyzed by means of an electronic nose based on thin film metal oxide gas sensors. Preliminary analyses by dynamic-headspace gas chromatographic-mass spectrometry showed significant differences in the semi-quantitative volatile compounds profile of spoiled tomato samples just after few hours from contamination, thus suggesting to employ the electronic nose for an early diagnose of microbial presence. The electronic nose was indeed able to reveal contamination, even at early stages depending on the type of contaminant (e.g. for Saccharomyces cerevisiae and Escherichia coli), and to recognize spoiled tomato samples with good classification performances. (C) 2008 Elsevier Ltd. All rights reserved.