氧瓶燃烧-分光光度法测定防水剂中总氟的含量  

Determination of Organic Fluorine In Waterproofer by Oxygen Bomb-Spectrophotometry

作　　者：魏艳[1] 徐应兴[1] 游爱鸳[1] 陈红梅[1] 

机构地区：[1]浙江传化股份有限公司,浙江杭州311215

出　　处：《有机氟工业》2011年第1期11-13,共3页Organo-Fluorine Industry

摘　　要：采用氧瓶燃烧,氢氧化钠溶液作为吸收液进行吸收,以Fe3+为络合剂、磺基水杨酸为显色剂建立了分光光度法测定防水剂中氟含量。采用试剂空白作参比,在500 nm处测体系吸光度,考察了显色剂用量、显色稳定时间和pH对测定结果的影响。工作曲线线性范围为0.4～4μg/mL。3#防水剂进行8次平行测定,其相对标准偏差为3.31%,该法能较好地适于防水剂中有机氟含量的测定。A new spectrophotometric method for the determination of F was studied.The sample was burnt in oxygen bomb and the reaction products were absorbed by NaOH solution.The absorbance of the system was recorded at 500 nm against a second system with a blank solution of reagent.The influence of developer dosage,stable time and pH was studied.The absorbency was linear to the concentration of F ion in the range of 0.4～4 μg/mL.The relative standard deviation is 3.31% for waterproofer 3#（n=8）.The method has been used to the determination of F ion in water with satisfactory results.

关 键 词：氟离子 铁离子 分光光度法 磺基水杨酸 

分 类 号：TS195.25[轻工技术与工程—纺织化学与染整工程]