桶装饮用水菌落总数检验中多因素对结果与判定的影响  

Effect of Results and Determination of Colony Count in Bottled Drinking Water

作　　者：杨毅[1,2] 吴贤格[3] 

机构地区：[1]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州市510640 [2]中国科学院研究生院 [3]肇庆学院化学化工学院

出　　处：《职业与健康》2009年第5期456-458,共3页Occupation and Health

摘　　要：目的对桶装水菌落总数检验中影响检验和判定的诸因素进行研究,以指导生产、检验与监督。方法从不同的检验时机、操作方法、培养条件以及结果的判定等方面,研究其对检验结果及判定的影响。结果检验时去盖取样的方法与从中心取检样方法的结果相近,合格率相等;对桶震摇10s后的检验结果,与震摇20s符合性好;用含Na2S2O3的营养琼脂培养基,可检出臭氧含量0.10mg/L时水中的细菌;样品存放7d后,其合格率由当天的100%下降至82.14%。结论取检样时去盖取样与从中心取样对检验结果无明显影响;震摇桶的操作、检验时臭氧含量、生产至检验时间等对检验结果有明显影响;培养基内添加10mg/LNa2S2O3,可提前发现质量风险。[ Objective] To investigate the multi-factors which affected the test and determination of total colony in bottled drinking water, so as to guide production, test and supervision. [ Methods] The factors of test moments, operation methods, cultivation conditions and results determination were discussed for their effects on the results. [ Results] The two sample taking methods of the removing cap collection and the center collection got a similar resuh, with an equal to standard rate. The results for samples taken 10 seconds＇jolting were in lines with samples taken 20 seconds＇jolting. Bacteria were examined from water with an ozone content of 0.10 mg/L using the nutrient agar culture medium with 10 mg/L of Na2S2O3. The qualified rate of samples decreased from 100% of 1 days store to 82.14% of 7 days＇store. [ Conclusion] The two sample taking methods of the removing cap collection and the center collection have no obvious effect on test results. While ozone content in test, the time between production and test, etc have significant effect on test results. Culture medium with added 10 mg/L of Na2S2O3 can discover the quality risk in advance.

关 键 词：桶装饮用水 菌落总数 检验 

分 类 号：R123.1[医药卫生—环境卫生学]