摘要
提出了在Ｎａ２ＨＰＯ４－ＮａＯＨ介质中，利用Ｃｕ（Ⅱ）－ＣＡＳ－ｅｎ－ＣＴＭＡＢ四元体系测定铜的新方法．试验表明，铜、铬天青Ｓ）（ＣＡＳ）、乙二胺（ｅｎ）、溴化十六烷基三甲铵（ＣＴＭＡＢ）可迅速反应，生成黄绿色配合物．配合物的最大吸收峰位于５６０ ｎｍ处，表观摩尔吸光系数∈＝３．１６ Ｘ １０４Ｌ·ｍｏｌ－１·ｃｍ－１．铜量在０－１７ｐｇ／２５ ｍＬ范围内符合比耳定律本法适用于铝合金、粮食、人发及水中痕量铅的测定．
By using Cu(Ⅱ)-CAS-en-CTMAB quaternary complex, a new method for determining copper in a buffer solution of Na2HPO4-NaOH is presented. The experiment proves that Cu, CAS, en and CTMAB can quickly react on each other and product a yellow-green complex, whose maximum absorption wave- length is at 560nm, apparent molar absorptivity is 3. 16 × 104L·mol-l·cm-l, and density is in keeping with the Beer's law in the range of 0-17μg/25 m L. The method can be applied to determinating copper in alu- n1inum alloys, grain, hair and water.
出处
《吉林化工学院学报》
CAS
2001年第4期42-44,52,共4页
Journal of Jilin Institute of Chemical Technology
