离子色谱法测定饮用水中无机消毒副产物的不确定度的评定  

Evaluation of uncertainty in determining inorganic disinfection byproducts in drinking water by ion chromatographic method

作　　者：蔡刚[1] 邢海龙[1] 

机构地区：[1]海南省三亚市疾病预防控制中心检验检测所,572000

出　　处：《职业与健康》2012年第24期3079-3083,共5页Occupation and Health

摘　　要：目的通过用离子色谱法测定饮用水中无机消毒副产物的不确定度的评定,找出影响测定准确度的主要因素。方法按照GB/T 5750.10-2006《生活饮用水标准检验方法 .消毒副产物指标》[1]进行饮用水中亚氯酸盐、氯酸盐和溴酸盐的测定,应用测定不确定评定理论[2-3],评估分析过程中测量的重复性、离子色谱标准曲线等因素的标准不确定度,并合成标准不确定度。结果亚氯酸盐、氯酸盐和溴酸盐消毒副产物(DBP)阴离子的合成相对标准不确定度分别为0.002 8、0.002 6和0.003 6 mg/L。结论提高标准曲线测定时的精密度,以使标准曲线残差的标准偏差足够低,达到降低不确定度的目的。[ Objective ] To evaluate the uncertainty in determining inorganic disinfection byproducts （ DBP） in drinking water via ion chromatographic method, and find out the factors influencing the ianeertainty. [ Methods] According to the GB/T 5750. 10- 2006 “Standard Test Methods for Drinking Water Disinfection Byproducts Indicators”, chlorite, chlorate and bromate in drinking water were determined. Evaluation of uncertainty theory was applied to evaluate the standard uncertainty of the measurement repeatability, ion chromatography standard curve, etc which were used to synthesize standard uncertainty. [ Results ] The synthesized relative standard uncertainty of DBP anion in chlorite, chlorate and bromate determination was 0.002 8 rag/L, 0.002 6 mg/L and 0. 003 6 mg/L, respectively. [ Conclusion] In order to make the standard deviation of standard curve residual low enough, the precision of the determination standard curve should be elevated to achieve the purpose of reducing uncertainty.

关 键 词：不确定度 离子色谱 亚氯酸盐 氯酸盐 溴酸盐 无机消毒副产物 

分 类 号：R115[医药卫生—公共卫生与预防医学]