离子色谱法同时测定饮用水中5种消毒副产物
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摘要
目的建立同时测定饮用水中5种消毒副产物(ClO_2~-、ClO_3~-、BrO_3~-、二氯乙酸、三氯乙酸)的离子色谱测定方法。方法采用英蓝超滤在线样品前处理装置直接大体积进样,进样体积为100μl,Metrohm-940型离子色谱仪,电导检测器测定。流动相为乙腈-3.6 mmol/L碳酸钠溶液(10∶90,V/V);流速为0.7 ml/min。结果五种消毒副产物线性相关系数≥0.9995,加标回收率为83.3%～116.7%,RSD≤5%,方法的定量限为:ClO_2~-:0.10 mg/L、BrO_3~-:0.002 mg/L、ClO_3~-:0.10 mg/L、二氯乙酸:0.010 mg/L、三氯乙酸:0.020 mg/L。结论该法准确度好,灵敏度高,简单方便,适用于水中5种消毒副产物的同时测定。
Objective To establish a method of analyzing five disinfection by-products(DBPs)(ClO_2~-,ClO_3~-,BrO_3~-,DCAA,TCAA)in drinking water by ion chromatography.Methods The samples were determined by Metrohm-940 ion chromatography with inline filtration and conductivity detector.The injection volume was 100 μl.The mobile phase was acetonitrile-3.6 mmol/L Na_2CO_3(10∶90,V/V).The mobile speed was 0.7 ml/min.Results The method had good linearity(γ≥0.9995).The samples' rates of recovery were 83.3%～116.7%.RSD was below 5%.The limits of quantitation were ClO_2~-:0.10 mg/L,BrO_3~-:0.002 mg/L,ClO_3~-:0.10 mg/L,DCAA:0.010 mg/L,TCAA:0.020 mg/L.Conclusion The method is simple,sensitive,accurate and reproducible,which is suitable for analyzing five DBPs in drinking water simultaneously.
Objective To establish a method of analyzing five disinfection by-products(DBPs)(ClO_2~-,ClO_3~-,BrO_3~-,DCAA,TCAA)in drinking water by ion chromatography.Methods The samples were determined by Metrohm-940 ion chromatography with inline filtration and conductivity detector.The injection volume was 100 μl.The mobile phase was acetonitrile-3.6 mmol/L Na_2CO_3(10∶90,V/V).The mobile speed was 0.7 ml/min.Results The method had good linearity(γ≥0.9995).The samples' rates of recovery were 83.3%～116.7%.RSD was below 5%.The limits of quantitation were ClO_2~-:0.10 mg/L,BrO_3~-:0.002 mg/L,ClO_3~-:0.10 mg/L,DCAA:0.010 mg/L,TCAA:0.020 mg/L.Conclusion The method is simple,sensitive,accurate and reproducible,which is suitable for analyzing five DBPs in drinking water simultaneously.
引文
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[2] 朱明新,沈丽娜,朱小梅,等.二氧化氯在饮用水中消毒副产物的形成[J].安徽农业科学,2012,40(6):3508-3509,3561.
[3] 朱娜,张竹青,秦杨,等.离子色谱法测定水中5种消毒副产物和6种常见阴离子[J].中国卫生工程学,2017,1(1):31-32,35.
[4] 中华人民共和国卫生部,中国国家标准化管理委员会.GB/T 5749-2006 生活饮用水卫生标准[S].北京:中国标准出版社,2007.
[5] 中华人民共和国卫生部,中国国家标准化管理委员会.GB/T 5750-2006 生活饮用水卫生标准生活饮用水标准检验方法[S].北京:中国标准出版社,2007.
[6] 雷凯,王芳,魏玉霞,等.大体积直接进样离子色谱法同时测定饮用水中亚氯酸盐、氯酸盐和溴酸盐[J].现代预防医学,2016,43(18):3391-3393,3427.
[7] 霍晶.离子色谱法测定水中7种阴离子[J].中国无机分析化学,2014,4(2):8-10.
[8] National Cancer Institute(U.S.),IARC Working Group on the Evaluation of the Carcinogenic Risk of Chemicals to Humans.Some naturally occurring and synthetic food components furocoumarins and ultraviolet radiation[EB/OL].[2019-08-10].http://agris.fao.org/openagris/search.do?recordID=US201300627271.