Quantitative Analysis of Allylmethyl Sulfide, Dimethyl Disulfide, and Dipropyl Sulfide in Biopesticides Containing Allium sativum Extract Using Gas Chromatography Mass Spectrometry - Head Space Sampler
2015
Lim, S.J., National Academy of Agricultural Science, RDA, Wanju, Republic of Korea | Oh, Y.T., National Academy of Agricultural Science, RDA, Wanju, Republic of Korea | Kim, J.H., National Academy of Agricultural Science, RDA, Wanju, Republic of Korea | Choi, G.H., National Academy of Agricultural Science, RDA, Wanju, Republic of Korea | Park, B.J., National Academy of Agricultural Science, RDA, Wanju, Republic of Korea
BACKGROUND: Garlic (Allium sativum) contains polyphenols and sulfur compounds that are recognized as antioxidant, antithrombotic, anticancer, antibacterial, antimicrobial, nematicidal, and insecticidal activity. For this reason, the Environmentally-friendly Agriculture Promotion Act allowed the garlic extract as commercial biopesticide material for crop protection, nine commercial biopesticides containing A. sativum extract have been marketed in Korea. METHODS AND RESULTS: The determination of allylmethyl sulfide (AMS), dimethyl disulfide (DMDS), and dipropyl sulfide (DPS) in biopesticides containing A. sativum extract was developed and validated by gas chromatography (GC) mass spectrometry (MS) with head-space sampler. The developed method was validated, and the limit of quantification (LOQ) and recovery rates of AMS, DMDS, and DPS were 0.08, 0.32, and 0.09 mg/L and 90.3-91.3, 86.2-88.3, and 87.6-89.5%, respectively. From the nine commercial biopesticide samples, contents of AMS, DMDS, and DPS were analyzed using the developed method and results showed LOQ, LOQ-20.0 mg/L, and LOQ, respectively. CONCLUSION: The developed method would contribute to manufactures producing commercial biopesticides and the quality control of biopesticides containing A. sativum extract.
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