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%.
出处
《化学试剂》
北大核心
2017年第5期501-504,共4页
Chemical Reagents
作者简介
刘彩（1988-），女，江苏连云港人，硕士生，主要研究方向为资源利用化学。
通讯作者：马卫兴，E-mail：weixingma650528@126．com。
