地表水超痕量苯并(a)芘的检测及空白干扰消除

罗烨

引用本文:	罗烨.地表水超痕量苯并(a)芘的检测及空白干扰消除[J].环境监控与预警,2017,9(3):41-43
	LUO Ye.Determination of Ultra trace Benzo(a)pyrene in Surface Water and Elimination of Blank Interference[J].Environmental Monitoring and Forewarning,2017,9(3):41-43

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地表水超痕量苯并(a)芘的检测及空白干扰消除
罗烨
遵义市环境保护监测中心站，贵州遵义 563000

摘要:

采用液液萃取-超高效液相色谱仪接荧光检测器测定地表水中超痕量的苯并(a)芘，并对方法空白的干扰因素进行探讨。研究发现，该法的空白干扰主要来自于溶剂二氯甲烷，溶剂经蒸馏提纯后可消除干扰。以重新蒸馏提纯的二氯甲烷为提取剂，方法的检测限为0.05 ng/L，加标回收率为87.4%~132%，且空白测定值低于方法检出限，可满足地表水中超痕量苯并(a)芘检测的需求。

关键词: 苯并(a)芘超高效液相色谱空白干扰超痕量

DOI：

分类号:X832；O657.7⁺¹

文献标识码:B

基金项目:

Determination of Ultra trace Benzo(a)pyrene in Surface Water and Elimination of Blank Interference

LUO Ye

Environmental Protection Monitoring Centeral Station of Zunyi ,Zunyi, Guizhou 563000, China

Abstract:

This research adopts the liquid liquid extraction /ultra high performance liquid chromatography coupled with fluorescence detector for the determination of ultra trace benzo(a)pyrene in surface water. And the interference factors of blank are discussed. The research shows that dichloromethane containing a small amount of benzo(a)pyren is the main factor leading to blank interference，and solvent redistillation can remove interference. By using the purified dichloromethane, the detection limit is 0.05 ng/L, and the recovery rate was 87.4%~132%. The blank value was lower than the detection limit. The method can be used for the quantitative detection of ultra trace amounts of benzo(a)pyrene in water.

Key words: Benzo(a)pyrene UHPLC Blank interference Ultra trace