无氧化剂化学发光体系对空气中二氧化硫的定量测定  

Quantitation of sulfur dioxide in air by non-oxidiant chemiluminescence system

作　　者：杨凤珍 叶霞 YANG Feng-zhen;YE Xia(College of Chemistry and Chemical Engineering,Cangzhou Normol University,Cangzhou 061001 China)

机构地区：[1]河北省沧州师范学院化学与化工学院

出　　处：《化学研究与应用》2019年第10期1798-1801,共4页Chemical Research and Application

基　　金：河北省科技厅重点研发计划项目(17273721)资助

摘　　要：采用无氧化剂化学发光体系对空气中二氧化硫进行定量测定。用0.06%碳酸钠溶液作为吸收剂吸收空气中的二氧化硫,该吸收液与酸性的罗丹明6G-吐温80溶液相遇时,会产生强烈的化学发光信号,根据光信号的大小可定量测定空气中二氧化硫的含量。工作曲线线性范围为5.0×10^-7~1.0×10^-4 mol·L^-1,检出限为1.0×10^-7 mol·L^-1。对浓度为1.0×10^-5 mol·L^-1的亚硫酸钠溶液连续测定5次,相对标准偏差RSD为3.8%。该测定方法用于空气中二氧化硫含量的测定,结果令人满意。Sulfur dioxide intheair was quantitatively determined by non-oxidant chemiluminescence(CL)system.Sulfur dioxide intheair was absorbed by 0.06%sodium carbonate solution as absorbent.The CL emission was generated by mixing the absorbed solution,tween80 and rhodamine6G in acidic medium.The content of sulfur dioxide intheair could be quantitatively determined according to the CL intensity.The quantitation range is from 5.0×10^-7 to 1.0×10 ^-4 mol·L^-1 with a detection limit of 1.0×10 ^-7 mol·L ^-1 .Thesodium sulfite solution with a concentration of 1.0×10^-5 mol·L^-1 was continuously determined for five times with relative standard deviation RSD of 3.8%.The proposed method was applied to the quantitation of sulfur dioxide in air with satisfactory results.

关 键 词：化学发光 二氧化硫 碳酸钠 吐温80 罗丹明6G 

分 类 号：O657[理学—分析化学]