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

Tóm tắt

Triazole fungicides are widely used as broad-spectrum fungicides, non-steroidal
antiestrogens for various industrial applications in Vietnam. Their residues have been frequently
detected in multiple environmental, vegetables and foods. The application of modern techniques
to detect residues of insecticide have been applied for many years and more and more
developing. With the aim to fast, accurately detect insecticide residues and at a low cost, we
applied AOAC 2007.1 extraction method and developed the programme analysis on gas
chromatography mass spectrometry Shimadzu QP2010. The validation of this method was
evaluated according to the guidance of AOAC 2016. The results showed that LOD, LOQ of this
method was 0.0044 mg/kg and 0.014 mg/kg respectively. The linear range of difenoconazole and
propiconazole was 0.01-0.5 µg/mL (R2 > 0.99). The repeatability of the method in lettuce at 3
concentrations of 100μg/kg, 200μg/kg, 400μg/kg ranged from 4.1% to 9.8%. The
recovery/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.