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地表水超痕量苯并(a)芘的检测及空白干扰消除
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.
作者姓名:罗烨
作者单位: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
收稿时间:2017/1/14 0:00:00
修稿时间:2017/2/15 0:00:00

Determination of Ultra trace Benzo(a)pyrene in Surface Water and Elimination of Blank Interference
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.
Authors:LUO Ye
Institution: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.
Keywords:Benzo(a)pyrene  UHPLC  Blank interference  Ultra trace
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