Department of Analytical and Applied Chemistry, School of Engineering, Institut Químic de Sarrià-Ramon Llull University, Via Augusta 390, 08017 Barcelona, Spain.
Multifunctional Forest Management Program, Forest Science and Technology Centre of Catalonia (CTFC), Ctra. St. Llorenç de Morunys, Km 2, 25280 Solsona, Spain.
Molecules. 2023 Dec 12;28(24):8050. doi: 10.3390/molecules28248050.
In recent years, recurrent droughts have weakened stone pine () forests and facilitated the emergence of harmful pests and diseases, including the . The production of stone pine nuts has declined over the past five years. To control this hemipteran pest, a synthetic pyrethroid insecticide called deltamethrin is being tested. However, it is necessary to estimate the residue left by these treatments in forest stands. Therefore, a fast and robust analytical procedure was developed based on QuEChERS clean-up extraction, followed by gas chromatography coupled with an electron capture detector. This optimized method can detect residual concentrations of deltamethrin in pine nuts and pine needles up to 0.1 and 6 μg kg, respectively, with a limit of quantification of 0.4 and 20 μg kg. Great recoveries (between 84 and 102%) were obtained for both matrices, and no matrix effect was observed. The results showed that two weeks after spraying, the deltamethrin content in the needles of stone pines decreased by up to 75%, and after nine months, its presence was like that of nontreated trees.
近年来，反复发生的干旱削弱了石松（）林，并为有害的害虫和疾病的出现提供了便利，包括。过去五年里，石松子的产量有所下降。为了控制这种半翅目害虫，正在测试一种名为溴氰菊酯的合成拟除虫菊酯杀虫剂。然而，有必要估计这些处理在林分中留下的残留物。因此，基于 QuEChERS 净化提取，建立了一种快速而稳健的分析方法，随后进行气相色谱分析，配有电子俘获检测器。这种优化方法可以检测到松子和松针中溴氰菊酯的残留浓度分别高达 0.1 和 6μgkg，定量限分别为 0.4 和 20μgkg。两种基质的回收率均在 84%至 102%之间，且未观察到基质效应。结果表明，施药后两周，石松针叶中的溴氰菊酯含量下降了 75%以上，九个月后，其含量与未处理的树木相似。
