Anions Change in Water Boiled Repeatedly in Electric Kettles Made by Different Materials

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.