随着城市居民生活水平的提高,桶装饮用水以其方便快捷等优点越来越受到消费者的青睐。桶装水不但正进入大部分家庭,而且许多单位也都大力普及。桶装水饮用时间长极易受微生物的污染,严重时会引起人的胃肠不适症状。张冠峰等[1]曾对桶装饮用纯净水开封后(未使用)保质期进行研究, With the improvement of living standards of urban residents, bottled drinking water is more and more favored by consumers because of its convenience and quickness. Bottled water is not only entering the majority of families, but many units are also vigorously popularized. Bottled water, drinking time is very vulnerable to microbial contamination, can cause serious gastrointestinal symptoms. Zhang Guanfeng et al [1] once bottled drinking pure water unsealed (unused) shelf life of the study,