饮用水氯胺法消毒过程中一氯胺的水杨酸分光光度法测定  

MONOCHLORAMINE TESTING METHOD IN CHLORAMINATION PROCESS——SALICYLATE SPECTROPHOTOMETRIC METHOD

作　　者：陶辉[1,2] 王玲[3] 李星[4] 王花平[4] 李圭白[1] 

机构地区：[1]哈尔滨工业大学,城市水资源与水环境国家重点实验室,哈尔滨150090 [2]河海大学环境科学与工程学院,南京210098 [3]安徽建筑工业学院环境工程系,合肥230601 [4]北京工业大学建筑工程学院,北京300040

出　　处：《环境化学》2009年第1期126-131,共6页Environmental Chemistry

基　　金：国家自然科学基金(No．50578052);国家863计划(2007AA06Z339)资助项目．

摘　　要：本文建立了一种水杨酸分光光度法,用于一氯胺的测定.结果表明,在水杨酸为1.0ml,硝普钠为0.10ml,pH值为11.8和反应时间为60min时,方法效果最好,吸光度与一氯胺具有很好的线性关系(R^2=0.9999).一氯胺的回收率为100±5%.水中其它共存离子,如SO_4^(2-),PO_4^(3-),Ca(2+),Mg(2+)等在常见浓度范围内均不影响一氯胺的定量.方法检出限为0.02mg·l^(-1),对不同浓度标样的测定表明,相对标准偏差<10%,自来水本底中的加标回收率为96.0%-103.5%.The determination method, salicylate spectrophotometric method, which .can differentiate inorganic monochloramine from organic chloramines. Parameters in the method was modified as salicylic acid 1.0ml, nitroprussiate 0. 10ml, pH11. 8 and reaction time 60min, in which situation the absorption at 703nm was linear with concentration of monochloramine （R^2 = 0. 9999 ） . The recovery of inorganic monochloramine in organic chloramines was within 100±5%. The typical ions in water do not interfere with the qutification of monochloramine. The detection limit of this method was 0. 02mg·l^-1. 20 tests of different standard sample shown that the RSD 〈 10%, and the recovery of standard sample in tap water was 96. 0%--103.5%.

关 键 词：一氯胺 水杨酸 Berthelot反应 分光光度法. 

分 类 号：TU991.2[建筑科学—市政工程]