二硫代安替比林甲烷光度法测定铅冶炼废水中的微量砷  

Determination of Trace Arsenic in Smelting Wastewater by Spectrophotometric with Disulfoantipymethane

作　　者：左国强[1] 赵亚鹏 杨学 晋沙沙 尚文红 ZUO Guoqiang;ZHAO Yapeng;YANG Xue;JIN Shasha;SHANG Wenhong(Department of Metallurgy and Chemical Engineering,Jiyuan Vocational and Technical College,Jiyuan 459000,China;Jiyuan Center for Disease Control and Prevention,Jiyuan 459000,China)

机构地区：[1]济源职业技术学院冶金化工系,济源459000 [2]济源市疾病预防控制中心,济源459000

出　　处：《理化检验（化学分册）》2020年第4期454-458,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：河南省高等学校重点科研资助项目(16B150008);济源职业技术学院青年骨干教师资助项目。

摘　　要：建立了利用二硫代安替比林甲烷光度法测定铅冶炼废水中微量砷的分析方法。在1.8mol·L^-1硫酸介质中,砷与二硫代安替比林甲烷显色剂发生灵敏的显色反应,最大吸收波长为331nm。考察了显色剂用量、显色反应时间、介质、酸度、不同价态砷对测定结果的影响。结果表明:使用4cm的比色皿,As^3+的质量浓度在0.04~0.6mg·L^-1内与其对应的吸光度之间呈线性关系,线性回归方程为y=1.063 x+0.001,相关系数为0.999 3,表观摩尔吸光系数为2.7×10^4L·mol^-1·cm^-1。按照标准加入法进行回收试验,测得回收率为97.0%~105%,相对标准偏差(n=5)为1.3%~2.6%,该方法用于测定铅冶炼废水中微量砷的结果满意。An analytical method for the determination of trace arsenic in lead smelting wastewater by spectrophotometric with disulfoantipymethane.In 1.8 mol· L^-1 H2SO4 medium, arsenic reacts with disulfoantipylmethanesensitively with an absorption maximum at 331 nm.The effects of reaction conditions,such as the amount of color reagent,reaction time,reaction medium,acidity and different valence arsenicon the absorbency were investigated.The results showed that linear relationship was found in the range of 0.04-0.6 mg·L^-1 As^3+ in10 mL solution using a 4 cm cuvette with the reagent blank as a reference,the linear regression equation was y=1.063 x+0.001,and the correlation coefficient was 0.999 3,the molar absorptivity was 2.7×10^4 L·mol^-1·cm^-1.Test for recovery was made by standard addition method,giving values of recovery in the range of 97.0%-105%,and values of RSDs(n=5)ranged from 1.3%to 2.6%.The proposed method was applied to the determination of trace arsenic in smelting wastewater with satisfactory result.

关 键 词：二硫代安替比林甲烷光度法 总无机砷 铅冶炼废水 

分 类 号：O657.31[理学—分析化学]