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Citation: SU You-Zhi, LI Fang, ZHAO Guang-Yue, HUANG Zhi-Qiang, LEI Hong-Qin, LI Yan-Mei, LU Ping. Determination of Tembotrione in Vegetative Foods by QuEChERS-High Performance Liquid Chromatography-Tandem Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(1): 118-123. doi: 10.11895/j.issn.0253-3820.160342 shu

Determination of Tembotrione in Vegetative Foods by QuEChERS-High Performance Liquid Chromatography-Tandem Mass Spectrometry

1.
Comprehensive Technical Service Centre of Yili Entry-Exit Inspection and Quarantine Bureau, Yining 835000, China;
2.
Qinghai Entry-Exit Inspection and Quarantine Bureau, Xining 810000, China;
3.
Hunan Entry-Exit Inspection and Quarantine Bureau, Changsha 410004, China

Received Date: 28 April 2016
Revised Date: 19 September 2016

A method for determination of tembotrione in vegetative foods using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed. The sample was pretreated using modified QuEChERS (quick, easy, cheap, effective, rigged and safe) method in which the extraction and clean-up steps were completed in one procedure. The sample was extracted with acidic acetonitrile (containing 0.1% formic acid), and cleaned up by graphitized carbon black (GCB), and then the extracting solution was centrifuged and filtrated before detection. The HPLC-MS/MS method was performed on a C₁₈ column with gradient elution of acetonitrile and 0.1% formic acid at a flow rate of 0.25 mL/min. The mass spectrometric analysis was carried out with electrospray positive ion source (ESI⁺), and multiple reaction monitoring mode (MRM). The matrix-matched external standard method was used for quantification. The results showed that the calibration curves were linear in the range of 0.5-100 ng/mL with the correlation coefficients larger than 0.996, the limits of quantification (LOQ, S/N≥10) were 1.0 μg/kg in ten different matrix (corn, rice, wheat, grape, apple, raisin, Chinese wolfberry, tomato, cucumber, cabbage). The mean recovery of tembotrione was 82.0%-111.8% and the relative deviation (RSD) was 3.0%-14.9% at 1.0, 2.0 and 10.0 μg/kg with three spiked levels. The method is highly effective and suitable for the monitoring of pesticide residue analysis.
- Tembotrione,
- Vegetative foods,
- High performance liquid chromatography-tandem mass spectrometry
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