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暖水瓶使用时间久了,瓶的内壁就会结成一些斑点的黄色沉淀,这主要是由于在饮用水中含有碳酸钙和碳酸镁。这些化合物在暖水瓶内长时间积累,附在瓶壁上,成为水垢。 防疫部门对装几十天开水的5磅热水瓶中的水垢进行化学分析,发现含有多种有害金属元素:镉为0.034毫克,钼为0.012毫克,铁为24毫克,砷力0.21毫克,汞为0.44毫克,这说明,即使符合卫生标准的饮用水,
The pot has been used for a long time, and the inner walls of the bottle will have some yellowish deposits, mostly due to the presence of calcium carbonate and magnesium carbonate in the drinking water. These compounds accumulate for a long time in a thermos bottle and attach to the bottle wall to become limescale. The epidemic prevention department conducted a chemical analysis on the scale in a 5-pound thermos filled with boiling water for several dozen days and found that it contains many kinds of harmful metal elements: 0.034 mg of cadmium, 0.012 mg of molybdenum, 24 mg of iron, 0.21 mg of arsenic and 0.44 mg of mercury Mg, which shows that even in line with hygienic standards for drinking water,