SXO光度法测定铜合金中微量铅的研究

Study on Determining Micro - Lead Contaninde in Copper Alloy by SXO Photometric Analysis

本文确定了以硫酸锶、硫酸铅快速沉淀分离杂质，在ｐＨ＝５５时，铅与半二甲酚橙（ＳＸＯ）形成红色配合物并于λ＝５４０ｎｍ处进行光度法测定微量铅的分析条件所拟方法精确度高、稳定性好、简便快速，适合于铅含量在０．００３％～０．２２％的铜合金的生产检验．

This article defined the analysing conditions of precipitating foreign substances rapidly by lead sulphate and strontium sulphate, and of that when pH = 5. 5, Lead and SXO form red coordination,and determined at λ = 540nm. This Method has a better accuracy and a better stableness. It is covement and save time, and it is fit for the production of copper alloy when lead content is at about 0. 003 % ￣0. 22%.