硝酸根-碘离子-吖啶橙体系的共振散射光谱用于测定亚硝酸根  

Resonance Scattering Spectrometry of Nitrite-iodide-acridine Orange System for Determination of Nitrite

作　　者：覃娜 凌霞 林海芳 杨美静 雷禄 马璐 QIN Na;LING Xia;LIN Haifang;YANG Meijing;LEI Lu;MA Lu(Guangxi Colleges and Universities Key Laboratory of Regional Ecological Environment Analysis and Pollution Control of West Guangxi,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,广西高校桂西区域生态环境分析和污染控制重点实验室,广西百色533000

出　　处：《化工技术与开发》2024年第7期63-66,共4页Technology & Development of Chemical Industry

基　　金：2022年广西壮族自治区大学生创新创业训练计划项目(S202210609088);广西教育厅2022年广西高校中青年教师科研基础能力提升项目(2022KY0738)。

摘　　要：在5.2×10^(-4)mol·L^(-1)硫酸存在下,NO_(2)^(-)与过量的I^(-)发生氧化还原反应生成阴离子I_(3)^(-),I_(3)^(-)与体系中带正电荷的染料分子吖啶橙结合后,形成体积较大的缔合物微粒,缔合物微粒表现出强的共振散射效应,据此建立了一种采用共振散射光谱法测定亚硝酸根的新方法。研究了硫酸、吖啶橙、KI等因素对体系的影响,在最佳实验条件下,NO_(2)^(-)在9.0×10^(-4)~0.012μg·mL^(-1)浓度范围内与313.6nm处的共振散射强度增大值(ΔI_(313.6nm))呈线性关系,线性方程为ΔI_(313.6nm)=52.068+62505ρ(ρ为质量浓度),相关系数为0.9947,检出限为5.6×10^(-4)μg·mL^(-1)。In 5.2×10^(-4)mol/L H_(2)SO_(4),excessive I^(-)was oxidized by NO_(2)^(-)to form I_(3)^(-),I_(3)^(-)combined with acridine orange that was one kind of cationic dyes to form bigger association particles exhibitd strong resonance scattering effect.Thus,a new method for the determination of nitrite by resonance scattering spectrometry was developed.The effects of H2SO4,KI and acridine orange on the system were investigated.Under the optimized experimental conditions,the concentrations of NO_(2)^(-)in the range of 9.0×10^(-4)~0.012μg/mL was in proportion to the increased resonance scattering intensity at 313.6nm(ΔI_(313.6nm)),the linear equation of the method wasΔI_(313.6nm)=52.068+62505ρ(ρ:μg/mL),with the related coefficient of 0.9947,and a detection limit of 5.6×10^(-4)μg/mL NO_(2)^(-)was achieved.

关 键 词：亚硝酸根 共振散射光谱法 吖啶橙 缔合物微粒 

分 类 号：O657.3[理学—分析化学]