摘要
用自制的分相器与流动注射仪联用，对有机相析出液－ 液萃取光度法测定微量铜的流路参数和操作程序进行优化。以新铜试剂（ 溶剂Ｖ乙醇∶Ｖ辛醇＝ １∶１） 为显色剂，用含一定量乙醇的辛醇溶液作载流，采用双道流路，在４５８ ｎｍ 处进行检测。方法的线性范围是０ ．０５ ～１ ．０５ ｍｇ／Ｌ，萃取富集倍数１０ ，检测限为２０ μｇ／ Ｌ，分析速度３６／ ｈ ，方法的精密度（ ＲＳＤ） 是４ ．０ ％ （ｎ ＝１３） 。测定锌矿石样品中的铜，结果与推荐值一致。
A method for the spectrophotometric determination of trace Cu 2+ with flow injection liquid liquid extraction separation and pre concentration was developed. Experimental conditions and manifold parameters were investigated in detail. The detection limit is 20 μg/L for Cu 2+ and the precision of 4.0% RSD ( n =13). The sample throughput is 36/h and the concentration efficiency is 10. The liner range is 0.05～1.05 mg/L for copper. The results obtained from the reference materials are in good agreement with the certified values.
出处
《岩矿测试》
CAS
CSCD
北大核心
1999年第4期263-266,共4页
Rock and Mineral Analysis
