吹脱-电导法测定水中氨氮及其自动分析仪  

To Detect NH_3-N in Water with Blow-off-conductometry and The Automatic Analyzer

作　　者：王维德[1] 于宝祥[1] 梁秀凤[1] 

机构地区：[1]山东省环境监测中心站,山东济南250013

出　　处：《环境监测管理与技术》2003年第1期30-31,35,共3页The Administration and Technique of Environmental Monitoring

摘　　要：建立了吹脱-电导法测定水和污水中的氨氮的方法。该方法是在90℃温度下,以气体将水样中氨氮吹出,用5mmol/L硫酸吸收,吸收液电导率的变化,在一定浓度范围内与氨氮吹出量成正比。测定标准样品的相对标准差和相对误差均为2 7%,方法的精密度和准确度均较好。根据该方法原理研制的氨氮在线自动分析仪测定自行配制的氨氮标准溶液,相对误差在2 8%以内,测定值准确可靠,最低检出限为0 1mg/L。两台样机分别用于黄河边国家水质自动站测定地表水和济南水质净化一厂测定污水,经过约5个月的运转,情况良好。To research the method of blowoffconductometry to detect the NH3-N in water and wastewater. The procedure and method were discussed in this paper. The relative standard deviation was 2.7% with high accuracy. For the online automatic analyzer based on this method, to detect NH3-N, relative standard deviation was less than 2.8%, the lowest detection limit was 0.1?mg/L. Two sample analyzers were used in two sites for test. With 5 months test, all was fine.

关 键 词：氨氮 吹脱-电导法 自动监测 地表水 污水 

分 类 号：X832[环境科学与工程—环境工程] X853