2,2'-联吡啶分光光度法测定烟气中二氧化硫  

Determination of Sulfur Dioxide in Flue Gas by 2,2'-Bipyridyl Spectrophotometry

作　　者：刘彩[1,2] 马卫兴[3] 路源[2] 

机构地区：[1]淮海工学院化学工程学院,江苏连云港222005 [2]中国科学院能源动力研究中心,江苏连云港222005 [3]淮海工学院药学院,江苏连云港222005

出　　处：《化学试剂》2017年第5期501-504,共4页Chemical Reagents

摘　　要：在HAc-Na Ac缓冲液中基于亚硫酸根可将三价铁离子还原为亚铁离子,后者与2,2'-联吡啶形成红色配合物,由此提出了分光光度法测定工业燃煤锅炉排烟中二氧化硫的新方法。在体系最大吸收波长520 nm处,二氧化硫溶液浓度在3.2~40 mg/L范围内符合比尔定律,其回归方程为A=0.032 31c(μg/m L)-0.106 91,相关系数r为0.998 3,表观摩尔吸光系数ε为2.576×10~3L/(mol·cm)。将该法用于工业燃煤锅炉排烟中二氧化硫的检测,回收率在98.44%~100.3%之间。该法所用仪器简单,且操作简便、快速。A new spectrophotometric method for the determination of sulfur dioxide in flue gas from industrial coal-fired boiler was proposed,based on which ferric ions can be reduced to ferrous ions by sulfite,ferrous ions reacts with 2,2＇-bipyridyl to form a red complex in a medium of HAc-Na Ac buffer solution. Beer＇s law is obeyed in the concentration range of 3. 2 ～ 40 mg/L of sulfur dioxide with its maximum absorption wavelength at 520 nm. The linear regression equation of the calibration was A = 0. 032 31c（ μg/m L）-0. 106 91,with a regression correlation coefficient 0. 998 3 and the apparent molar absorption coefficient of absorptivity 2. 576 × 10^3L/（ mol·cm）. The method was simple,easy to operate,fast and used sulfur dioxide in flue gas from industrial coal-fired boiler,and the coveries were between 98. 44% ～ 100. 3%.

关 键 词：2 2'-联吡啶 分光光度法 燃煤锅炉 二氧化硫 

分 类 号：O657.32[理学—分析化学]