Citation: ZHANG Qun, LIU Chunhua, WU Nancun, WU Xiaofang, LI Shuhuai. Determination of propargite, tebuconazole and bromopropylate pesticide residues in Taiwan green jujubes by gas chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, ;2014, 32(8): 886-889. doi: 10.3724/SP.J.1123.2014.04014 shu

Determination of propargite, tebuconazole and bromopropylate pesticide residues in Taiwan green jujubes by gas chromatography-tandem mass spectrometry

1.
Analysis and Testing Center, Chinese Academy of Tropical Agricultural Sciences, Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Haikou 571101, China

Corresponding author: ZHANG Qun,
Received Date: 8 April 2014
Available Online: 26 May 2014
Fund Project: 海南省重点科技计划项目(2DXM2014047). (2DXM2014047)

An analytical method was established for the determination of propargite, tebuconazole and bromopropylate in Taiwan green jujubes (Zizyphus mauritiana Lam) by gas chromatography-tandem mass spectrometry (GC-MS/MS). The sample was extracted with acetonitrile from the Taiwan green jujubes after treated with a homogenizer. The organic phase was then separated from water phase by adding NaCl. The extract was further purified on a carbon/NH₂ cartridge with elution solvents of acetonitrile/toluene (3:1, v/v). Finally, the target analytes were separated by a capillary gas chromatographic column SLB-5MS (30 m×0.25 mm×0.25 μm). A tandem quadrupole mass spectrometer operated in either full scan mode or in MS/MS mode for multiple reaction monitoring (MRM) was used for the qualitative and quantitative analysis of the constituents, respectively. The results showed that the average recoveries of the three pesticides ranged from 75.8% to 103.6% with the RSDs of 1.7%-9.3% at the spiking levels from 0.01 mg/kg to 0.50 mg/kg (n=5). The calibration curves showed good linearity in the range of 0.01-0.50 mg/kg, with the determination coefficients over 0.99 (R²>0.99). The limits of quantification (LOQs) were 0.01 mg/kg for propargite, tebuconazole and bromopropylate in Taiwan green jujubes. The method is available for the determination of propargite, tebuconazole and bromopropylate pesticide residues in Taiwan green jujubes.
- gas chromatography-tandem mass spectrometry (GC-MS/MS),
- propargite,
- tebuconazole,
- bromopropylate,
- Taiwan green jujubes
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沈阳化工大学材料科学与工程学院沈阳 110142