Quantification of atrazine and its metabolites in urine by on-line solid-phase extraction-high-performance liquid chromatography-tandem mass spectrometry

被引:43
|
作者
Panuwet, Parinya [2 ]
Nguyen, Johnny V. [2 ]
Kuklenyik, Peter [2 ]
Udunka, Simeon O. [2 ]
Needham, Larry L. [2 ]
Barr, Dana B. [1 ,2 ]
机构
[1] CDC, Atlanta, GA 30333 USA
[2] Natl Ctr Environm Hlth, Div Sci Lab, Ctr Dis Control & Prevent, Atlanta, GA 30360 USA
关键词
atrazine; metabolites; urine; mass spectrometry;
D O I
10.1007/s00216-008-2102-0
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
We have developed a method using on-line solid-phase extraction-high-performance liquid chromatography-tandem mass spectrometry (SPE-HPLC-MS/MS) and isotope dilution quantification to measure atrazine and seven atrazine metabolites in urine. The metabolites measured were hydroxyatrazine, diaminochloroatrazine, desisopropylatrazine, desethylatrazine, desethylatrazine mercapturate, atrazine mercaturate and atrazine itself. Our method has good precision (relative standard deviations ranging from 4 to 20% at 5, 10 and 50 ng/mL), extraction efficiencies of 67 to 102% at 5 and 25 ng/mL, relative recoveries of 87 to 112% at 5, 25, 50 and 100 ng/mL limits of detection (LOD) ranging from 0.03 to 2.80 ng/mL. The linear range of our method spans from the analyte LOD to 100 ng/mL (40 ng/mL for atrazine and atrazine mercapturate) with R-2 values of greater than 0.999 and errors about the slope of less than 3%. Our method is rapid, cost-effective and suitable for large-scale sample analyses and is easily adaptable to other biological matrices. More importantly, this method will allow us to better assess human exposure to atrazine-related chemicals.
引用
收藏
页码:1931 / 1939
页数:9
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