Determination of nitenpyram and its metabolites in agricultural products by using hydrophilic interaction liquid chromatography-tandem mass spectrometry

作者：Yoshida Tatsuo^*; Murakawa Hiroshi; Toda Kei

来源：Journal of Pesticide Science, 2013, 38(1-2): 27-32.

DOI：10.1584/jpestics.D12-049

• nitenpyram
• 2-[N-(6-chloro-3-pyridylmethyl)-N-ethyl]amino-2-methyliminoacetic acid (CPMA)
• N-(6-chloro-3-pyridylmethyl)-N-ethyl-N %26apos
• -methylformamidine (CPMF)
• hydrophilic interaction liquid chromatography
• tandem mass spectrometry

A simple and rapid method for the measurement of a neonicotinoid pesticide, nitenpyram, and its metabolites, CPMA and CPMF, was investigated. The three compounds were determined individually and simultaneously by simple ultrasonic extraction followed by hydrophilic interaction liquid chromatography-tandem mass spectrometry (HILIC-MS/MS). Good chromatograms were obtained using a non-modified silica gel column. The calibration curves were straight (R-2%26gt;0.999) for each compound; they were 0.002-2 mg/kg for 5g of agricultural product sample with limits of detection (S/N=3) of 0.24-0.36 mu g/kg (nitenpyram), 0.12-0.19 mu g/kg (CPMA), and 0.13-0.18 mu g/kg (CPMF). Good recoveries were obtained for sweet pepper, mandarin orange, onion, and brown rice (93.0-106.6% in recovery). For contaminated samples, data by the presented method agreed well with nitenpyram data by HPLC-UV and the total of CPMA and CPMF by derivatization followed by gas chromatography-flame thermionic detection.

• 出版日期2013