This work presents an easy and quick miniaturized procedure for the analysis of dithiocarbamates fungicides (DTC), by GC-MS, in yerba mate, an important product in South America. The sample amount, the volume of extracting solvent and acid solution, and the time of hot bath shaking were minimized. A clean-up procedure based on PSA, GCB and MgSO4 was studied in order to improve analytical signal and reduce GC-MS system damage. Blank yerba mate samples were spiked with thiram at equivalent CS₂ concentrations of 0.1, 0.3, 0.5 and 1 mg kg^–1. The validated method at least 2 times faster than the traditional method and was according to the latest European guidelines for pesticide residue analysis. Linearity, limits of detection and quantification, matrix effects, trueness and precision were assessed. Sixty-five commercialized samples from southern Brazil and Argentina were analyzed; 14% of samples presented CS₂ concentration greater than LOQ (0.1 mg kg^–1).

这项工作提供了一种简单快速的小型化程序，用于通过 GC-MS 分析南美洲重要产品马黛茶中的二硫代氨基甲酸盐类杀菌剂 (DTC)。最小化样品量、萃取溶剂和酸溶液的体积以及热浴摇动的时间。研究了基于 PSA、GCB 和 MgSO4 的净化程序，以改善分析信号并减少 GC-MS 系统损坏。空白马黛茶样品中添加了等效 CS ₂浓度为 0.1、0.3、0.5 和 1 mg kg ^{–1的福美双}. 经过验证的方法至少比传统方法快 2 倍，并且符合最新的欧洲农药残留分析指南。对线性、检测限和定量限、基质效应、准确度和精密度进行了评估。分析了来自巴西南部和阿根廷的 65 个商业化样品；14% 的样品的 CS ₂浓度高于 LOQ (0.1 mg kg ^–1 )。