GC determination of myclobutanil and diniconazole pesticide residue in sorghum by ultrasonic assisted extraction

doi:10.14088/j.cnki.issn0439-8114.2019.10.034

Abstract

Abstract: A method of ultrasonic assisted extraction combined with gas chromatography was used to determine pesticide residue of myclobutanil and diniconazole in sorghum.The sample was extracted by a mixture of acetonitrile and acetone,then purified with concentrated flory diatomite acid,concentrated with rotary evaporation,and analyzed with GC-ECD. Linearity range of myclobutanil was found between 0.012 5~0.400 μg/g,and the detection limit（3S/N） was 0.002 μg/g,and the values of RSD（n=6） was 3.7%;Linearity range of diniconazole was found between 0.004 76~0.152 μg/g,and the detection limit（3S/N） was 0.000 83 μg/g,and the values of RSD（n=6） was 1.2%. This developed method is simple,quickness,rapid,sensitive and can therefore be used for the determination of myclobutanil and diniconazole in sorghum.

Key words: gas chromatograph, ultrasonic assisted extraction, myclobutanil, diniconazole, sorghum

CLC Number:

S132

CHEN Shun-qin, YANG Hui, WANG Ai-min, XIA Bin, WANG Jie, HUANG Jiang, LUO Peng, LIU Yu-bo. GC determination of myclobutanil and diniconazole pesticide residue in sorghum by ultrasonic assisted extraction[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(10): 146-149.

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