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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Assessment of the stability of pesticides during cryogenic sample processing. 1. Apples
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Assessment of the stability of pesticides during cryogenic sample processing. 1. Apples

机译：评估低温样品处理过程中农药的稳定性。 1.苹果

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摘要

An assessment of the stability of a large number (106) of pesticides and related compounds during the cryogenic sample processing of apples has been undertaken. For the first time the procedure included an assessment of the losses during the freezing of the fruits, prior to processing. The stability of each pesticide during processing was assessed by comparing the mean recovery for the laboratory-spiked samples with the mean "survival" of the pesticides in cryogenically processed samples. The results clearly demonstrate that the vast majority, 94 of 106, of pesticides were stable during cryogenic processing. Of particular importance was that losses of several pesticides [bitertanol (95%), heptenophos (50%), isofephos (40%), and tolylfluanid (48%)] reported to occur during ambient processing of apples did riot occur during cryogenic processing. Losses of dichlofluanid (54%), chlozolinate (22%), and etridiazole (40%), previously reported to occur during ambient processing of apples, were reduced to barely significant levels (10, 17, and 14%, respectively) by cryogenic processing. Small apparent losses for a few of the compounds were attributable to analytical and sample handling difficulties, rather than to losses during processing, and need further investigation.
机译：已经对苹果低温样品处理过程中大量（106）农药和相关化合物的稳定性进行了评估。该程序首次包括在加工前评估水果冷冻期间的损失。通过比较实验室加标样品的平均回收率与低温加工样品中农药的平均“存活率”，可以评估加工过程中每种农药的稳定性。结果清楚地表明，在低温处理过程中，绝大多数农药（106种中的94种）是稳定的。尤为重要的是，据报道在苹果的常温加工过程中发生了几种农药的损失[比特罗醇（95％），庚烯磷（50％），异氟苯酚（40％）和甲苯基苯胺（48％）]，而低温加工过程中却发生了暴动。先前据报道在苹果的环境加工过程中发生的二氯氟苯胺（54％），氯唑啉酸盐（22％）和三唑的损失（分别为40％）通过低温降低至几乎不明显的水平（分别为10％，17％和14％）处理。某些化合物的表观损失很小，这是由于分析和样品处理困难，而不是由于加工过程中的损失所致，需要进一步研究。

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