Optimization of HPLC Method for the Determination of Cyromazine Residues in Different Matrices
Based on GB 31658.12-2021,the pre-treatment method is optimized,the samples are extracted with 1%ammonia in acetonitrile solution,degreased with hexane,and purified by QuEChERS method.The recoveries are verified in different matrices.The results show that the recovery rate of the method is 78.26%to 82.82%,and the precision is 3.05%to 7.71%;the linear relationship is good in the range of 0.05～2.00 mg·L-1,R2=0.999 9;the limited signal-noise ratio is greater than 3,and the signal-noise ratio of quantitative limit is greater than 10,which can meet the test requirements.This method is simple and fast to operate,and is suitable for the detection of cyromazine residue in large quantities.
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