As the demand for organic food is increasing by Korean consumers, the demand for organic agro-materials is also increasing by farmers. Due to heterogeneous properties of organic agro-materials, it is difficult to analyze multi-pesticides residue in these products. There is no specific analytical technique for the multi-residue pesticide analysis in stuffs. So, we attempted a new modified analytical method for quality management of these products. In this study, represent an organic agro-materials such as animal compost fertilizer, a multi-residue analysis for 113 pesticides was attempted using GC-MS/MS. There are too many matrices, so we developed the modified analysis method, where 2 g sample was extracted with 10mL of acetonitrile and anhydrous magnesium sulfate. And then, we were using the clean-up by the amino-propyl cartridge. This method was satisfied the LOQ below 0.01 mg/L. The LOQ of the amenable pesticides in samples was 0.01 mg/L, and their matrix-matched standard calibration curves to the organic materials products had the high correlation coefficients of &gt; 0.99. Therefore, this new modified developed method is acceptable with the range of 60 to 130% recovery of almost pesticides in the sample. The number of pesticides amenable to the range of 60 to 130% was 104 in animal compost fertilizer. The results of this study could be used as a quick and sensitive analysis tool for pesticides in the organic agro-materials.

Development of multi-residue analysis method of pesticides in organic agro-materials

2019 Fall National Meeting

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