XÁC ĐỊNH GIÁ TRỊ SỬ DỤNG CỦA PHƯƠNG PHÁP PHÂN TÍCH DƯ LƯỢNG HÓA CHẤT BẢO VỆ THỰC VẬT NHÓM TRIAZOLE TRONG RAU XÀ LÁCH BẰNG MÁY SẮC KÝ KHÍ KHỐI PHỔ

Triazole fungicides are widely used as broad-spectrum fungicides, non-steroidalantiestrogens for various industrial applications in Vietnam. Their residues have been frequentlydetected in multiple environmental, vegetables and foods. The application of modern techniquesto detect residues of insecticide have been applied for many years and more and moredeveloping. With the aim to fast, accurately detect insecticide residues and at a low cost, weapplied AOAC 2007.1 extraction method and developed the programme analysis on gaschromatography mass spectrometry Shimadzu QP2010. The validation of this method wasevaluated according to the guidance of AOAC 2016. The results showed that LOD, LOQ of thismethod was 0.0044 mg/kg and 0.014 mg/kg respectively. The linear range of difenoconazole andpropiconazole was 0.01-0.5 µg/mL (R2 > 0.99). The repeatability of the method in lettuce at 3concentrations of 100μg/kg, 200μg/kg, 400μg/kg ranged from 4.1% to 9.8%. Therecovery/reproducibility/uncertainty of difenoconazole was from 81.7 to 108.0%/8.2% to 8.5%/21.70; of propiconazole 80.2% to 107.2%%/7.1% to 9.1%/21.79.