碘化亚铜共振散射光谱法测定铜离子  

Resonance Scattering Spectrometric Determination of Copper Ion with Cuprous Iodide

作　　者：唐爱眉 潘丽珊 韦子贤 梁志红 彭月霞 凌绍明 Tang Aimei;Pan Lishan;Wei Zixian;Liang Zhihong;Peng Yuexia;Ling Shaoming(College of Chemistry and Environment Engineering,Baise University,Baise 533000,China)

机构地区：[1]百色学院化学与环境工程学院,广西百色533000

出　　处：《山东化工》2021年第20期87-88,90,共3页Shandong Chemical Industry

基　　金：2019年百色学院校级大学生创新创业训练计划项目资助(项目编号:201910609189)。

摘　　要：在pH值为3.1的HCl-NaAc缓冲溶液中,铜离子与过量碘化钾作用生成疏水性的碘化亚铜微粒而产生共振散射效应,据此建立了一种用共振散射光谱技术测定铜离子的分析方法。探讨缓冲溶液pH值、缓冲溶液和碘化钾用量以及反应温度、反应时间等因素对测定体系的影响,优化测定体系条件。在选定实验条件下,方法的线性范围为0.0833~1.67 mmol·L^(-1),线性回归方程为ΔI=-60.271+429.54C,相关系数(R^(2))为0.9757,检出限为0.037 mmol·L^(-1)。方法应用于黄铜样品中铜含量测定,测定结果的RSD为2.7%,回收率在85.0%~97.4%之间。In the pH3.1 HCl-NaAc buffer solution,copper ions reacted with excess potassium iodide to generate hydrophobic cuprous iodide particles,resulting in resonance scattering effects.Based on this,an analytical method for the determination of copper ions by resonance scattering spectroscopy was established.We discussed the influence of the buffer solution pH value,buffer solution and potassium iodide dosage,reaction temperature,reaction time and other factors on the measurement system,and optimized the measurement system conditions.Under selected experimental conditions,the linear range of the method is 0.0833~1.67 mmol·L^(-1),the linear regression equation isΔI=-60.271+429.54C,the correlation coefficient(R^(2))is 0.9757,and the detection limit is 0.037 mmol·L^(-1).This method was applied to the determination of copper content in brass samples,the RSD of the determination result was 2.7%,and the recovery rate was between 85.0~97.4%.

关 键 词：铜合金 铜 碘化亚铜微粒 共振散射光谱法 

分 类 号：TQ153[化学工程—电化学工业]