原子荧光光谱法与DDTC银法测定聚氯化铝中砷的比较  

Comparison between Atomic Fluorescence Spectrometry and DDTC Silver Method for Determining Arsenic in Poly Aluminium Chloride

作　　者：吴强 刘红琼 WU Qiang;LIU Hong-qiong(Huzhou Waterworks Group Co. Ltd., Huzhou 313000, China;Eastern Union Stem Cell ＆ Gene Engineering Co. Ltd., Huzhou 313000, China)

机构地区：[1]湖州市水务集团有限公司,浙江湖州313000 [2]协和华东干细胞基因工程有限公司,浙江湖州313000

出　　处：《中国给水排水》2018年第8期115-118,共4页China Water & Wastewater

摘　　要：二乙基二硫代氨基甲酸银分光光度法(DDTC银法)为现行有效《生活饮用水用聚氯化铝》(GB 15892—2009)标准中砷含量测定的仲裁法。通过实验对原子荧光光谱法和DDTC银法测定生活饮用水用聚氯化铝中砷含量进行了比较,实验结果表明,两种方法都能够满足聚氯化铝产品标准中砷指标符合性判断的基本要求,但与DDTC银法相比,原子荧光光谱法具有工作曲线相关系数好、测定下限低、精密度好、加标回收率高(尤其低浓度时)、操作步骤简单、试剂环保等优点。因此,将原子荧光光谱法纳入生活饮用水用聚氯化铝国家标准,并替代DDTC银法作为仲裁法测定生活饮用水用聚氯化铝中砷含量是迫切和必要的。DDTC spectrophotometry is the current effective arbitration method in the standard for determining arsenic in Poly Aluminium Chloride for Treatment of Drinking Water （ GB 15892 - 2009 ）. Compared the difference between atomic fluorescence spectrometry and DDTC spectrophotometry for de- termining Arsenic in poly aluminium chloride used for treatment of drinking water, the results showed ： the two methods could meet the basic requirement for the judgement of the Arsenic content in poly aluminium chloride product standard; while the method of atomic fluorescence spectrometry has advantages in the better correlation coefficient of working curve, lower detection limit, higher precision of nitrite, more ef- fective standard addition recovery （especially with respect to low concentration）, more simple operation procedure and more superior environmental protection, etc. Therefore, it is urgent and necessary to take the atomic fluorescence spectrometry as arbitration method for determining Arsenic in poly aluminium chloride for treatment of drinking water.

关 键 词：生活饮用水用聚氯化铝 原子荧光光谱法 DDTC银法 砷 仲裁法 

分 类 号：TU991[建筑科学—市政工程]