摘要
目的:探讨气相色谱-质谱法测定自来水中15种有机污染物的分析方法。方法:自来水中的15种有机污染物经过C18固相萃取柱富集,用乙酸乙酯和二氯甲烷洗脱浓缩,DB-5MS毛细管色谱柱分离,气相色谱-质谱联用仪检测,采用全扫描和选择离子方式同时扫描,通过目标组份的质谱图和保留时间与标准品的的质谱图和保留时间作对照进行定性,内标法单离子定量。结果:样品加标回收率在72%～130%之间,相对标准偏差在1.00%～4.35%之间,检出限在0.0014μg/ml～0.045μg/ml之间。结论:实验结果表明,该方法除测定苯并[α]芘检出限较高外,测定其它14种有机污染物的各项技术指标均能满足检测要求。
Objective：To discuss gas chromatography/mass spectrometry method for the determination of 15 kinds of organic pollutants in tap water. Methods： The 15 kinds of organic pollutants in water were gathered by Cts solid phase extraction column, using ethyl acetate and dichloromethane for elution concentration, DB -5MS capillary chromatographic column for separation, gas chromatography/mass spectrometry for detection, full scan and selected ion mode scanning were involved at the same time. The qualitative determination was done through the comparison of mass spectra and retention time between target analytes and standard substances, and quantification was done by single ion and internal standard method. Results： The sample recovery rate was 72% - 130%, relative standard deviation was 1.00% - 4.35%, the detection limit was 0.0014 μg/ml - 0. 045μg/ml. Conclusion： The experimental results show that the method has high detection limit in determination of benzol α] pyrene, and various technical indicators in determination of the other 14 kinds of organic pollutants can meet the testing requirements.
出处
《中国卫生检验杂志》
北大核心
2012年第1期23-25,共3页
Chinese Journal of Health Laboratory Technology
基金
呼和浩特市科技局2010-重-农社-23
关键词
气相色谱-质谱法
自来水
有机污染物
Gas chromatography/mass spectrometry
Tap water
Organic pollutants
