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投稿时间：2022-01-13
投稿时间：2022-01-13
中文摘要: 以圆铃枣、木枣、骏枣为研究对象，采用高效液相色谱、气相色谱-质谱联用、高效液相色谱串联质谱等方法对比分析固态发酵黑化前后3种红枣中苯甲酸及21种农药残留的变化。结果表明，黑化前后，木枣和骏枣中苯甲酸的含量变化较小，但圆铃枣中苯甲酸含量明显降低，由65.41 mg/kg下降到40.90 mg/kg；3种红枣中的农残在固态发酵过程中变化明显，圆铃枣和骏枣中检测出9种农药残留，木枣中检测出7种。圆铃枣中多菌灵残留量由130.39 μg/kg降至37.07 μg/kg，下降71.6%；骏枣中啶虫脒残留量由初始45.82 μg/kg经固态发酵后含量降为0。通过聚类分析、主成分分析及热图等方法对红枣进行品种鉴别及筛选。
Abstract:The content of benzoic acid and 21 pesticide residues in three jujube varieties（Muzao，MZ；Junzao，JZ；Yuanlingzao，YLZ）before and after blackening was determined by high performance liquid chromatography，gas chromatography-mass spectrometry，and high performance liquid chromatography-tandem mass spectrometry.The results showed that the content of benzoic acid in blackened MZ and JZ changed little，while that in blackened YLZ decreased from 65.41 mg/kg to 40.90 mg/kg.The pesticide residues in the three varieties of jujubes varied significantly during the blackening process.Nine pesticide residues were detected in YLZ and JZ，and seven in MZ.After blackening，the residue of carbendazim in YLZ decreased by 71.6% from 130.39 μg/kg to 37.07 μg/kg；the residue of acetamiprid in JZ decreased from 45.82 μg/kg to 0.Furthermore，clustering，principal component analysis，and heat map method were employed to identify the varieties of jujube and screen out the varieties.
文章编号：202305026 中图分类号： 文献标志码：
基金项目:中央引导地方科技发展专项资金项目（YDZX2021071）；山东省土地发展集团有限公司科研项目；校企合作项目；佳县红润枣业专业合作社横向课题
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