Abstract The degradation of imidacloprid in soil and its uptake and translocation to chili and tomato plants was evaluated, as a proof of concept, of the possibilities of the combination of molecularly imprinted polymers (MIPs) and ion mobility spectrometry (IMS) for a fast and sensitive bioprocesses monitoring tool. To do it, a method based on the selective extraction of imidacloprid from soil and plant materials was developed. In the selected conditions, the MIP-IMS procedure provided a recovery of imidacloprid in soil and plant samples from 102 to 114%, for spiked concentration levels from 0.2 to 2.0 μg g−1. Precision of the methodology, expressed as the relative standard deviation (RSD) of a 100 and 1000 μg L−1 imidacloprid standard solution was 11 and 6%, respectively, being the RSD for the analysis of a soil sample spiked at a concentration level of 1 μg g−1 of 11% (n = 4). Limits of detection and quantification of 0.03 and 0.10 μg g−1 in the solid sample were also obtained, respectively. Regarding imidacloprid degradation, this study evidenced that the process follows a first order kinetics with a half-life between 39 and 45 days in soil, being necessary a growing period of 33 days before pesticide detection in stems and leaves.

中文翻译：

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分子印迹提取-离子迁移谱法监测吡虫啉对辣椒和番茄植物的吸收和易位

摘要 吡虫啉在土壤中的降解及其在辣椒和番茄植物中的吸收和转运被评估，作为概念证明，结合分子印迹聚合物 (MIP) 和离子迁移谱 (IMS) 进行快速和敏感的生物过程监测工具。为此，开发了一种基于从土壤和植物材料中选择性提取吡虫啉的方法。在选定的条件下，MIP-IMS 程序提供了土壤和植物样品中吡虫啉的回收率为 102% 至 114%，加标浓度水平为 0.2 至 2.0 μg g-1。该方法的精密度，以 100 和 1000 μg L-1 吡虫啉标准溶液的相对标准偏差 (RSD) 表示，分别为 11% 和 6%，是用于分析以 1 μg g-1 的 11% (n = 4) 的浓度水平加标的土壤样品的 RSD。还分别获得了固体样品中 0.03 和 0.10 μg g-1 的检测限和定量限。关于吡虫啉降解，该研究证明该过程遵循一级动力学，在土壤中的半衰期为 39 至 45 天，在茎和叶中检测到农药之前需要 33 天的生长期。