摘要
目的了解使用不同材质电热水壶在反复煮沸水后各阴离子含量变化的情况。方法用离子色谱法和重氮偶合分光光度法测定陶瓷、不锈钢和塑料3种材质电热水壶在多次煮沸水后其水中阴离子的含量,通过检测结果来分析煮沸是否引起水中阴离子的含量变化以及3种材质电热水壶引起水中阴离子变化是否相同。结果不同材质水壶中的水经8次煮沸后阴离子含量总体有少许增加,3种材质中不锈钢材质的电热水壶其水中的阴离子变化幅度比其他两种稍大。结论检测结果均符合生活饮用水卫生标准,但根据各阴离子含量变化的情况分析,建议还是避免开水的反复煮沸,可参考性地选择电热水壶。
Objectives In order to learn the variation of anions in water after boiled for many times in the electric kettle made by different materials. Methods The content of anions in the water boiled in the electric kettle made by ceramics, plastics and stainless steel was tested by ion chromatography and diazo-couple spectrophotometry. Results The content of anions in water boiled for eight times was increased a little in all electric kettles, however, it was slightly greater in the stainless steel electric kettle than the other two kinds of electric kettles. Conclusions The content of anions in water boiled for eight times conformed with the hygienic standard for drinking water, but based on the variation of anion content tested, it is better not to boil water for many times. The detection results could be used as a reference for choosing electric kettles.
出处
《环境卫生学杂志》
北大核心
2014年第6期565-568,共4页
JOURNAL OF ENVIRONMENTAL HYGIENE
关键词
阴离子
电热水壶
开水
反复煮沸
anion, electric kettle, boiled water, boiling repeatedly
