生活饮用水中总大肠菌群的两种方法比较

Comparison of two methods for total coliforms in drinking water

目的比较多管发酵法和滤膜法在检测生活饮用水中总大肠菌群时的优缺点。方法本实验参考国标《生活饮用水标准检验方法》(GB/T 5750.12-2006)的检测方法,分别用多管发酵法和滤膜法对103份生活饮用水水样中的总大肠菌群进行检验。并根据国标《生活饮用水卫生标准》(GB 5749-2006)对结果进行分析比较。结果在103份生活饮用水水样中,用多管发酵法和滤膜法检测合格的水样数分别为99份和98份,合格率分别为96.12%和95.15%,差异无统计学意义(χ~2=0.116,P>0.05)。结论两种检验方法对于生活饮用水中总大肠菌群的检验具有一致性,但因其适用范围不同,应根据实际情况选用。

Objective To compare the advantages and disadvantages of multiple tube fermentation and membrane filtration in detecting total coliforms in drinking water. Methods According to the detection method of ＂Standard Test Method for Drinking Water＂（GB/T 5750.12-2006）, the total coliforms in 103 drinking water samples were examined by multiple tube fermentation and membrane filtration. And according to the ＂Hygienic Standard for Drinking Water＂（GB 5749-2006）, the results were analyzed and compared. Results In 103 drinking water samples, the qualified water samples detected by multiple tube fermentation and membrane filtration were 99 and 98, the qualified rate were 96.12% and 95.15%, the difference was not statistically significant（χ~2=0.116, P〉 0.05）. Conclusion The two test methods are consistent in the detection of coliforms in drinking water, but due to their different ranges of application,they should be selected according to the actual conditions.