论文部分内容阅读
运用比色法测定铜合金中的微量铅,如打萨宗法,PAR法均需使用剧毒的氰化钾,这对环境带来污染.文献介绍了用硫酸铅钾复盐沉淀法将铅自铜合金中分离出来,然后以半二甲酚橙显色以完成微量铅的测定,该法虽然革除了氰化物的污染但速度不快.文献介绍了用N—235萃取分离打萨宗法,虽然也不使用氰化物但显色条件控制较严不易掌握.为此,本文引用N—235有快速分离的长处及半二甲酚橙易于掌握、灵敏度较高的优点,这样就需要进行衔
The use of colorimetric determination of trace lead in copper alloys, such as playing Sazavan method, PAR method are required to use highly toxic potassium cyanide, which pollute the environment.This paper describes the use of lead sulfate potassium salt complex precipitation of lead from Copper alloy, and then semi-xylenol orange color to complete the determination of trace lead, although the law to get rid of the cyanide pollution but not fast. The literature describes the use of N-235 extraction Separation Sazon Act, although also Do not use cyanide, but the control of the color condition is not easy to grasp.To this end, this article quoted N-235 has the advantages of rapid separation and semi-xylenol orange easy to master, the advantages of higher sensitivity, so you need to carry on the title