In the present study, an elevated temperature homogeneous liquid extraction coupled with ionic liquid‑based dispersive liquid–liquid microextraction was developed to extract five carbamate pesticides (pirimicarb, carbaryl, methiocarb, aldicarb, and carbofuran) from packed fruit juice samples. The method consisted of a two-step procedure in which cyclohexylamine was used in order to extract the target analytes. In the first step, the analytes were extracted from a sample solution thermostated at elevated temperature (80 °C) into a water-immiscible organic solvent (cyclohexylamine). In the second step, the separated organic phase was mixed with 1-butyl-3-methylimidazolium chloride (as the solvent for extraction) and the mixture was spread into deionized water. In this step, cyclohexylamine controlled the solubility of 1-butyl-3-methylimidazolium chloride in the aqueous phase and acted as a dispersive solvent and a phase separation agent, simultaneously. After centrifugation, we removed all the gathered organic phases and analyzed them by using high-performance liquid chromatography diode-array detector. Figure of merits of the method including the limits of detection and quantification, enrichment factors, extraction recoveries, and relative standard deviations were obtained within ranges 0.4–3.9 and 1.5–13.2 ng mL⁻¹, 147–217, 59–87%, and 3.3–5.5%, respectively, indicating that the method was successful in determining the analytes.

在本研究中，开发了一种高温均相液体萃取与基于离子液体的分散液-液微萃取相结合的方法，用于从包装果汁样品中萃取出五种氨基甲酸酯农药（吡虫威，西维威，甲硫基，甲硫威，涕灭威和呋喃丹）。该方法由两步程序组成，其中使用环己胺以提取目标分析物。第一步，将样品从在高温（80℃）下恒温的样品溶液中提取到与水不混溶的有机溶剂（环己胺）中。在第二步骤中，将分离的有机相与1-丁基-3-甲基咪唑鎓氯化物（作为萃取溶剂）混合，并将混合物铺展到去离子水中。在这一步中 环己胺控制了1-丁基-3-甲基咪唑鎓氯化物在水相中的溶解度，并同时充当分散溶剂和相分离剂。离心后，我们除去所有收集的有机相，并使用高效液相色谱二极管阵列检测器对其进行分析。该方法的优缺点包括在0.4–3.9 ng和1.5–13.2 ng mL范围内的检测和定量限，富集因子，提取回收率和相对标准偏差。^-1，147-217，59-87％，和3.3-5.5％，分别指示该方法是成功的在确定的分析物。