铜质水嘴中铅含量与析出量的相关性探讨

试验探讨铜质水嘴中铅含量与析出量的关系。对一系列含铅标准铜片按照GB/T 17219–1998《生活饮用水输配水设备及防护材料的安全性评价标准》要求进行浸泡试验,使用原子吸收光谱法或电感耦合等离子体质谱法检测浸泡液中的铅含量,再利用20个已知铅含量的铜质水嘴样品进行析出量的检测和验证。得到铜质水嘴中铅含量与析出量的关系。试验结果表明:大部分内腔有电镀层的铜质水嘴,铅析出量小于5.0μg/L;内腔无电镀层的铜质水嘴中铅含量小于0.5%时,铅析出量小于5.0μg/L,符合GB/T 17219–1998标准要求。

Discussion on Correlation Between Lead Content and the Amount of Immersion Precipitation of Copper Faucet

The corelationbetween lead content and the amount of immersion precipitation of copper faucet was studied. According to GB/T 17219-1998 Standard for Safety Evaluation of Equipment and Protective Materials in Drinking Water System, standard copper tablets containing lead were soaked,the lead content of soaking liquid were measured by atomic absorption spectrum(AAS) and inductively coupled plasma mass spectrometry(ICP-MS). Then 20 copper faucets samples with certain lead content were soaked for detection and confirmation. The relation between the lead content of copper faucet and the release of lead in soaking liquid was found. The experimental results showed that the release of lead was substantially less than 5.0μg/L for cavity with plating copper faucets. And as cavity free plating brass faucets in the content of lead was less than 0.5%, the release of lead was less than 5.0μg/L,which met the requirements of the standard of GB/T 17219-1998.