甲醛法测定二氧化硫影响曲线斜率因素的探讨  

INFLUENCE FACTORS ON CURVE SLOPE DURING SO_2 DETERMINATION BY FORMALDEHYDE ASSAY

作　　者：申礼鹏 朱美华 王庆刚 SHEN Li-peng1,2, ZHU Mei-hua1,2, WANG Qing-gang1,2(1.National Engineering Laboratory of Coal Mine Ecological Environment Protection, Huainan 232001, China; 2.National Engineering Research Institute of Coal Mining, Huainan 232001, Chin)

机构地区：[1]煤矿生态环境保护国家工程实验室,安徽淮南232001 [2]煤炭开采国家工程技术研究院,安徽淮南232001

出　　处：《能源环境保护》2018年第2期35-36,共2页Energy Environmental Protection

基　　金：安徽省科技攻关项目(1604a0802115)

摘　　要：提高甲醛法测定二氧化硫的准确度,针对实验操作条件的敏感性,分析了比色管使用、甲醛缓冲吸收液、测量时间对测定结果的影响。结果表明,将10ml比色管改为25ml比色管可促进液体摇匀,甲醛吸收液放置时间过长会导致试剂空白吸光值升高,超出稳定时间后测量各曲线点的消光值会导致曲线斜率偏低。The impacts of colorimetric tube, formaldehyde absorption liquid and measurement time on results were analyzed to improve the accuracy of SO2 determination by formaldehyde assay. The results show that changing 10 mL colorimetric tubes to 25 mL promotes the mixing of solution. The excessive storage time of formaldehyde absorption liquid rises the absorption value of reagent blank. Detecting the extinction value of points on the curve after steady time results in low curve slope.

关 键 词：二氧化硫 甲醛法 校准曲线斜率 影响因素 

分 类 号：X83[环境科学与工程—环境工程]