Citation:
PENG Jie, GAN Jinhua, JU Xiaoqian, CHEN Jianwu, HE Li. Determination of chlorpyrifos residues in the paddy field aquatic products by ultra performance liquid chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography,
;2019, 37(7): 729-734.
doi:
10.3724/SP.J.1123.2019.01026
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A method was developed for the determination of chlorpyrifos residues in paddy field aquatic products by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Samples were extracted with acetonitrile and purified by using 0.2 g primary secondary amine (PSA) sorbent and 1.2 g MgSO4. The target compound was separated on a Hypersil GOLD C18 column (100 mm×2.1 mm, 5 μm), and was determined using a heated electrospray ionization (HESI) source in the positive ion selective reaction monitoring (SRM) mode. The analyte was quantified with external standard using the matrix-matched standard calibration curve method. The results showed that good linearities were obtained in the range of 0.5-100.0 μg/L, and the correlation coefficients were greater than 0.999. The spiked recoveries of chlorpyrifos ranged from 86.2% to 103.6% with RSDs of 3.5%-7.6% (n=6). The limits of detection and quantification were 0.25 μg/kg and 0.5 μg/kg, respectively. This method is simple, quick, sensitive, and suitable for the rapid determination and analysis of chlorpyrifos residues in paddy field aquatic products.
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