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Volume 26 Issue 3
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Article Navigation >  Journal of Pharmaceutical Practice and Service  > 2008  >  (3): 194-196

WANG Tao, CHAI Yi-feng, FAN Guo-rong, MI He-ming. Determination of dichlorovos residue in rice by microwave-assisted extraction/HPLC[J]. Journal of Pharmaceutical Practice and Service, 2008, (3): 194-196.
Citation: WANG Tao, CHAI Yi-feng, FAN Guo-rong, MI He-ming. Determination of dichlorovos residue in rice by microwave-assisted extraction/HPLC[J]. Journal of Pharmaceutical Practice and Service, 2008, (3): 194-196.
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Determination of dichlorovos residue in rice by microwave-assisted extraction/HPLC

  • Department of Pharmaceutical Analysis,School of Pharmacy,Second Military Medical University,Shanghai 200433,China

  • Received Date: 2007-11-05
  • Objective: To develop a method of microwave-assisted extraction（MAE）followed by HPLC for the determination of the residue of dichlorovos in rice. Methods: Pesticide residues were extracted from rice samples with a solvent mixture.Extracts were cleaned up with a column filled with Florisil and neutral aluminum oxide.Nova-Pak C18 column（4 μm,3.9×150 mm）was used with acetonitrile:water（3070,V/V）solution as mobile phase,and the flow speed was 1.0mL/min.The ultraviolet detection wavelength was 200nm. Results: Good linear correlation for dichlorovos was found in the concentration range of 2.00-25.00 μg/mL.The detection limit was 0.5 μg/mL for dichlorovos（S/N=3）.The average recovery rate of rice hull and brown rice were 81.1%（RSD3.9%） and 78.9%（RSD4.0%）,respectively. Conclusion: This method is simple and rapid.It can be used for the determination of dichlorovos residue in rice with satisfactory results.
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Determination of dichlorovos residue in rice by microwave-assisted extraction/HPLC

  • Department of Pharmaceutical Analysis,School of Pharmacy,Second Military Medical University,Shanghai 200433,China
  • Received Date: 2007-11-05

Abstract: Objective: To develop a method of microwave-assisted extraction（MAE）followed by HPLC for the determination of the residue of dichlorovos in rice. Methods: Pesticide residues were extracted from rice samples with a solvent mixture.Extracts were cleaned up with a column filled with Florisil and neutral aluminum oxide.Nova-Pak C18 column（4 μm,3.9×150 mm）was used with acetonitrile:water（3070,V/V）solution as mobile phase,and the flow speed was 1.0mL/min.The ultraviolet detection wavelength was 200nm. Results: Good linear correlation for dichlorovos was found in the concentration range of 2.00-25.00 μg/mL.The detection limit was 0.5 μg/mL for dichlorovos（S/N=3）.The average recovery rate of rice hull and brown rice were 81.1%（RSD3.9%） and 78.9%（RSD4.0%）,respectively. Conclusion: This method is simple and rapid.It can be used for the determination of dichlorovos residue in rice with satisfactory results.

WANG Tao, CHAI Yi-feng, FAN Guo-rong, MI He-ming. Determination of dichlorovos residue in rice by microwave-assisted extraction/HPLC[J]. Journal of Pharmaceutical Practice and Service, 2008, (3): 194-196.
Citation: WANG Tao, CHAI Yi-feng, FAN Guo-rong, MI He-ming. Determination of dichlorovos residue in rice by microwave-assisted extraction/HPLC[J]. Journal of Pharmaceutical Practice and Service, 2008, (3): 194-196.
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