嘧菌酯农药标准物质的研制

Preparation of Reference Material of Azoxystrobin

为了研制嘧菌酯农药标准物质,用重结晶方法对嘧菌酯原药进行纯化,得到的纯品用四大谱进行结构鉴定,并进行了均匀性检验和稳定性检验,最后以8家实验室合作定值方式确定量值。研制的嘧菌酯农药标准物质量值为99.2%,扩展不确定度为0.6%。用归一化法验证该量值准确。

The study aimed to prepare the certified reference material of azoxystrobin. Azoxystrobin TC was purified by recrystallization, and then structure identification of the pure was studied by UV, IR, NMR and MS spectra. The homogeneity and stability were tested, and the value of the reference material was determined through eight-laboratory cooperation. The value of the reference material of azoxystrobin was 99.2% and expanded uncertainty was 0.6%. Normalization method showed that the values were accurate.