【摘要】 采用直接在枸杞(Lycium barbarum)不同基质中添加0.1 mg/kg吡虫啉,冷冻贮存,分阶段检测的方法,研究不同枸杞基质中吡虫啉残留稳定性和降解变化趋势。结果表明,冷冻条件下,枸杞干果中吡虫啉残留在半年内稳定性较好,枸杞鲜果在一年内稳定性较好;枸杞干果和鲜果不同处理之间吡虫啉残留变化差异不大,样品的处理(粉碎或匀浆)对吡虫啉的降解趋势没有显著影响;样品采集后可按检测需要尽快处理成粉碎样品或匀浆样品进行贮存,且控制枸杞干果在半年内检测,鲜果在一年内检测。更多还原

【Abstract】 This research studies the storage stability and degradation trends of imidacloprid residues in different matrix of Lycium barbarum,by the method of directly adding 0.1 mg/kg imidacloprid,frozen storage and phase detection. The results showed that under the condition of frozen,the storage stability of imidacloprid residues is good in half a year with dry fruits,and in a year with fresh fruit of Lycium barbarum. The change of imidacloprid residue is small difference between different processing of dry fruit and fresh fruit,and it’s no significant effect on the degradation trends of imidacloprid for sample processing(crushing or homogenate). According to testing need to storage sample which processed into crushing samples or homogenate samples as soon as possible after the sample collection,and control of dry fruit detection within half a year, fresh fruit detection within a year.更多还原