紫外分光光度法测定海水中季铵盐的含量  

UV-spectrophotometric Determination of Quaternary Ammonium Salt in Seawater

作　　者：李亚红[1,2] 陈冲[1] 武杰[1] 侯纯扬[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192 [2]天津大学材料科学与工程学院,天津300072

出　　处：《理化检验（化学分册）》2010年第2期136-137,共2页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金："十一五"国家重大科技攻关计划项目(2006BAB03A07)

摘　　要：提出了紫外分光光度法测定海水中季铵盐含量的方法。通过对不同浓缩倍数的海水进行紫外扫描,确定季铵盐的最大吸收波长为263nm。蒸馏水和海水中季铵盐的质量浓度和其吸光度分别在100mg·mL-1和50mg·mL-1以内呈线性关系。方法的检出限(3S/N)为3.205mg.L-1,平均回收率为94.95%,相对标准偏差(n=5)为1.9%。A method for the determination of quaternary ammonium salt in seawater by UVspectrophotometry was proposed. The absorption maximum at the wavelength of 263 nm was chosen by comparing UV spectra of seawater of different concentrations. Linear relationships between values of absorhance and mass concentration of quaternary ammonium salts in distilled water and seawater obtained were in ranges within 100 and 50 mg·L^-1respectively. Detection limit （3S/N） of the method was found to be 3. 205 mg·L^-1. The average recovery found was 94. 95%, with RSD （n=5） of 1.9%.

关 键 词：紫外分光光度法 海水 季铵盐 

分 类 号：O657.31[理学—分析化学]