水嘴浸泡水中铅的溶出规律分析

Analysis of Lead Concentrations in Simulate Water of Faucets

通过对22批次水嘴进行为时3周的浸泡试验,并收集其中9天上午的浸泡水,用原子吸收光谱检测浸泡水中的铅浓度,分析浸泡水中铅的溶出规律。结果显示,浸泡水中的铅浓度整体呈现下降趋势,第1周下降幅度最大,之后下降平缓;第3周,铅浓度呈现短暂回升,随后继续平缓下降。

Three weeks of immersion test are taken to 22 batches of faucets. During the experiment for three weeks, simulate water is collected according to JC/T 1043-2007 <Limit of lead extraction in faucets> and the lead concentrations are determined by Atomic absorption spectroscopy. The results showed that the concentrations of lead in simulate water are decreasing greatly in the first week and there is a short rebound of the lead concentrations in the third week. After that lead concentrations decreased slowly.