自动转换流动注射法快速测定制革废液中的氨氮和亚硝酸盐氮  

Fast determination of ammonia nitrogen and nitrite-nitrogen in tannery effluent by flow injection analysis of auto-conversion

作　　者：蒋和梅[1] 杨东静[1] 陈姝娟[1] 张新申[1] 

机构地区：[1]四川大学制革清洁技术国家工程实验室,四川大学皮革化学与工程教育部重点实验室,四川成都610065

出　　处：《化学研究与应用》2013年第3期317-321,共5页Chemical Research and Application

基　　金：国家863计划项目(2007AA092001-5)资助

摘　　要：对流动注射(FIA)分析仪流路进行改装,在蠕动泵前连接三通阀,通过三通阀的自动换样,实现了废液中氨氮和亚硝酸氮的快速自动测定。使用磺胺-NED显色体系,在530nm波长处有光吸收,氨氮和亚硝酸盐的测定范围分别为8～200μg.L-1和2～50μg.L-1,检出限分别为0.41μg.L-1和0.15μg.L-1,精密度RSD为1.48%(n=10)和1.00%(n=10)。该方法可用于制革废液中氨氮和亚硝酸盐的测定,加标回收率在98.6%～101%。A three-way valve connected before peristaltic pump to modify the flow path of flow injection（FIA） analyzer,it achieved fast and automatic determination of ammonia and nitrite nitrogen with auto-Conversion by three-way valve. With chromogenic system of sulfa-NED ,The absorhance was measured at 530nm. the linear range is 8-200μg· L-1 for ammonia nitrogen and 2-50μg· L-1 for nitrite nitrogen;the detection limit for NH4 ＋-N and NO2--N are 0.21μg· L-1 and 0. 15μg·L-1, and RSD are 1.48% （n= 10）and 1.00% （n= 11 ）,respectively. This method has been used to determine NH4＋-N and NO2--N in tannery effluent, result shows the recovery is between 98. 6% and 101.0%.

关 键 词：氨氮 亚硝酸盐 流动注射 制革废液 

分 类 号：O657.32[理学—分析化学]