Preparation of matrix reference materials of bifenthrin and cyhalothrin pesticide residues in green tea
Objective:The preparation method of matrix reference materials of bifenthrin and cyhalothrin pesticide residues in green tea was established.Methods:Green tea samples were sprayed with biphenylthrin and cyhalothrin.The samples were crushed,screened,homogenized and bottled.After the homogeneity and stability tests,the quantity value was determined by three laboratories.and the uncertainty was evaluated.Results:The amount values of bifenthrin and cyhalothrin in green tea were(0.185±0.019 7)and(0.207±0.046 6)mg/kg with k=2,and the confidence interval was 95％.Conclusion:The developed matrix reference materials of bifenthrin and cyhalothrin in green tea are homogeneous and stable enough,and the calibration results are reliable.
green teabifenthrincyhalothrinmatrix reference materialspreparation method
万方数据
维普
