气相色谱法和离子色谱法测定生活饮用水中二氯乙酸、三氯乙酸的方法比对
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摘要
目的优化并比较气相色谱法(gas chromatography)和离子色谱法(ion chromatography)测定生活饮用水中二氯乙酸、三氯乙酸。方法对气相色谱法和离子色谱法测定二氯乙酸、三氯乙酸的方法进行优化和改进,对灵敏度、精密度、回收率等指标作比对,并对中国疾病预防控制中心环境与健康相关产品安全所研制的标准物质进行定值,对测定结果进行统计学分析。结果 2种方法均能较好地对生活饮用水中二氯乙酸、三氯乙酸进行定性和定量分析,气相色谱法的检出限分别为1、0.5μg/L,平均回收率范围为96.0%～99.1%,相对标准偏差为0.66%～2.42%。离子色谱法的检出限分别为10、20μg/L,平均回收率范围为97.2%～99.8%,相对标准偏差为0.59%～1.90%。对标准物质定值结果无显著性差异。结论气相色谱法检出限低,离子色谱法前处理简单, 2种方法各有优缺点,可根据实际情况选择适宜的分析方法。
Objective To optimize and compare the determination of dichloroacetic acid and trichloroacetic acid in drinking water by gas chromatography(GC) and ion chromatography(IC). Methods The methods of determination of dichloroacetic acid and trichloroacetic acid by gas chromatography and ion chromatography were optimized and improved. The sensitivity, precision, recovery and other indicators were compared. The standard substance developed by the Chinese center for disease control and prevention of environmental and health related product safety institute was determined and the results were analyzed statistically. Results Both methods could be used for qualitative and quantitative analysis of dichloroacetic acid and trichloroacetic acid in drinking water. The limits of detection of dichloroacetic acid and trichloroacetic acid were 1 μg/L and 0.5 μg/L,respectively, the average recoveries were 96.0%～99.1%, and the relative standard deviations were 0.66%～2.42% by GC. The limits of detection of dichloroacetic acid and trichloroacetic acid were 10 μg/L and20 μg/L, respectively, the average recoveries were 97.2%～99.8%, and the relative standard deviations were 0.59%～1.90% by IC. There was no significant difference in the determination results of standard substance.Conclusion The limit of detection of gas chromatography is lower and the pretreatment methods of ion chromatography is simpler. Because the 2 methods have their own advantages and disadvantages, the appropriate analysis method can be selected according to the actual situation.
Objective To optimize and compare the determination of dichloroacetic acid and trichloroacetic acid in drinking water by gas chromatography(GC) and ion chromatography(IC). Methods The methods of determination of dichloroacetic acid and trichloroacetic acid by gas chromatography and ion chromatography were optimized and improved. The sensitivity, precision, recovery and other indicators were compared. The standard substance developed by the Chinese center for disease control and prevention of environmental and health related product safety institute was determined and the results were analyzed statistically. Results Both methods could be used for qualitative and quantitative analysis of dichloroacetic acid and trichloroacetic acid in drinking water. The limits of detection of dichloroacetic acid and trichloroacetic acid were 1 μg/L and 0.5 μg/L,respectively, the average recoveries were 96.0%～99.1%, and the relative standard deviations were 0.66%～2.42% by GC. The limits of detection of dichloroacetic acid and trichloroacetic acid were 10 μg/L and20 μg/L, respectively, the average recoveries were 97.2%～99.8%, and the relative standard deviations were 0.59%～1.90% by IC. There was no significant difference in the determination results of standard substance.Conclusion The limit of detection of gas chromatography is lower and the pretreatment methods of ion chromatography is simpler. Because the 2 methods have their own advantages and disadvantages, the appropriate analysis method can be selected according to the actual situation.
引文
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[8]肖洋,王新娟,韩伟.气相色谱法测定不同水质中的二氯乙酸和三氯乙酸[J].理化检验-化学分册,2014,50(8):979-982.Xiao Y,Wang XJ,Han W.GC determination of dichloroacetic acid and trichloroacetic acid in different water[J].Test Chem Anal B,2014,50(8):979-982.
[9]王红伟,闫惠珍,林少彬.离子色谱法同时测定水中5种消毒副产物[J].中国卫生检验杂志,2009,19(3):558-559.Wang HW,Yan HZ,Lin SB.Simultaneous determination of five DBPs in water by ion chromatography[J].Chin J Health LabTechnol,2009,19(3):558-559.
[10]齐剑英,吴颖娟,张平,等.离子色谱法测定饮用水中二氯乙酸和三氯乙酸[J].理化检验-化学分册,2007,43(11):947-949.Qi JY,Wu YJ,Zhang P,et al.Determination of dichloroacetic acid and trichloroacetic acid in drinking water by ion chromatography[J].Test Chem Anal B,2007,43(11):947-949.
[11]杨姣兰,曹宁涛,董梦萌.全国实验室生活饮用水中二氯乙酸检测的能力验证结果分析[J].环境与健康杂志,2017,34(11):1004-1007.Yang JL,Cao NT,Dong MM.Proficiency test for determination of dichloroacetic acid in drinking water among laboratories in China[J].JEnviron Health,2017,34(11):1004-1007.
[12]罗嵩,王红伟,林强,等.气相色谱法与离子色谱法测定饮用水消毒副产物中二氯乙酸的方法比对[J].环境卫生学杂志,2017,7(4):301-305.Luo S,Wang HW,Lin Q,et al.Comparison on dichloroacetic acid determination in disinfection by-products for drinking water with gas chromatographic and ion chromatographic methods[J].J Environ Hyg,2017,7(4):301-305.
[2]董淑江,高蓉.饮用水消毒副产物研究进展[J].职业与健康,2014,30(24):3628-3631.Dong SJ,Gao R.Research progress on drinking water disinfection by-products[J].Occup Health,2014,30(24):3628-3631.
[3]范丽莎,李玄,于衍真.水库水氯化消毒副产物毒性研究[J].环境保护科学,2014,40(5):24-27.Fan LS,Li X,Yu YZ.Genotoxicity study of the by-products generated from reservoir water chlorination[J].Environ Protect Sci,2014,40(5):24-27.
[4]向红,吕锡武.饮用水中卤乙酸致癌性的研究进展[J].安全与环境工程,2008,15(1):17-21.Xiang H,Lv XW.Study advance on carcinogenicity of haloacetic acids in drinking water[J].Saf Environ Eng,2008,15(1):17-21.
[5]GB 5749-2006生活饮用水卫生标准[S].GB 5749-2006 Standard for drinking water quality[S].
[6]GB/T 5750.10-2006生活饮用水标准检验方法消毒副产物指标[S].GB/T 5750.10-2006 Standard examination methods for drinking water-Disinfection by-products parameters[S].
[7]刘天洁,黄伟,李谦.生活饮用水中二氯乙酸三氯乙酸检测方法的改进[J].中国卫生产业,2014,(10):25-26.Liu TJ,Huang W,Li Q.The improvement of detection method for dichloroacetic acid and trichloroacetic acid in drinking water[J].China Health Ind,2014,(10):25-26.
[8]肖洋,王新娟,韩伟.气相色谱法测定不同水质中的二氯乙酸和三氯乙酸[J].理化检验-化学分册,2014,50(8):979-982.Xiao Y,Wang XJ,Han W.GC determination of dichloroacetic acid and trichloroacetic acid in different water[J].Test Chem Anal B,2014,50(8):979-982.
[9]王红伟,闫惠珍,林少彬.离子色谱法同时测定水中5种消毒副产物[J].中国卫生检验杂志,2009,19(3):558-559.Wang HW,Yan HZ,Lin SB.Simultaneous determination of five DBPs in water by ion chromatography[J].Chin J Health LabTechnol,2009,19(3):558-559.
[10]齐剑英,吴颖娟,张平,等.离子色谱法测定饮用水中二氯乙酸和三氯乙酸[J].理化检验-化学分册,2007,43(11):947-949.Qi JY,Wu YJ,Zhang P,et al.Determination of dichloroacetic acid and trichloroacetic acid in drinking water by ion chromatography[J].Test Chem Anal B,2007,43(11):947-949.
[11]杨姣兰,曹宁涛,董梦萌.全国实验室生活饮用水中二氯乙酸检测的能力验证结果分析[J].环境与健康杂志,2017,34(11):1004-1007.Yang JL,Cao NT,Dong MM.Proficiency test for determination of dichloroacetic acid in drinking water among laboratories in China[J].JEnviron Health,2017,34(11):1004-1007.
[12]罗嵩,王红伟,林强,等.气相色谱法与离子色谱法测定饮用水消毒副产物中二氯乙酸的方法比对[J].环境卫生学杂志,2017,7(4):301-305.Luo S,Wang HW,Lin Q,et al.Comparison on dichloroacetic acid determination in disinfection by-products for drinking water with gas chromatographic and ion chromatographic methods[J].J Environ Hyg,2017,7(4):301-305.