桶装纯净水内亚硝酸盐含量的影响因素  

Influencing Factors of Nitrite Content in Barrel Water

作　　者：耿慧霞[1] 季晓辉[2] 王来[2] 

机构地区：[1]商丘师范学院生命科学系,河南省商丘市476000 [2]商丘医学高等专科学校

出　　处：《职业与健康》2011年第21期2452-2453,共2页Occupation and Health

摘　　要：目的了解纯净水中亚硝酸盐含量的影响因素。方法分别在7月份和1月份采集饮水机上放置不同时间和反复加热的水样,用重氮耦合分光光度法检测亚硝酸盐的含量。结果在7月份,纯净水在饮水机上放置20 d,亚硝酸盐含量将超过国家标准的1/2;反复加热20次,就可以超过国家标准,差异有统计学意义(均P<0.01)。结论纯净水在饮水机上放置和反复加热容易导致亚硝酸盐的形成,需采取措施避免其对机体带来危害。[Objective]To understand the influencing factors of nitrite content in purified water. [Methods]The water samples were collected from drinking fountain with different storage time and repeated heating in July and January respectively,and the nitrite content was detected by the diazonium coupled spectrophotometry. [Results]In July,when the purified water was stored for 20 days on drinking fountain,the nitrite content would exceed 1/2 times of national standards;the nitrite content could exceed national standards after heating twenty times repeatedly,the difference was significant（P0.01）. [Conclusion]The nitrite can generate by water storage in drinking fountain and repeated heating.It is necessary to take measures to avoid harm to body.

关 键 词：饮水机 纯净水 亚硝酸盐 

分 类 号：R123.1[医药卫生—环境卫生学]