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首页> 外文期刊>Journal of separation science. >Application of an optimized dispersive nanomaterial ultrasound-assisted microextraction method for preconcentration of carbofuran and propoxur and their determination by high-performance liquid chromatography with UV detection
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Application of an optimized dispersive nanomaterial ultrasound-assisted microextraction method for preconcentration of carbofuran and propoxur and their determination by high-performance liquid chromatography with UV detection

机译：优化的分散型纳米材料超声辅助微萃取法在呋喃丹和丙草胺的预浓缩中的应用及其高效液相色谱-紫外检测法的测定

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摘要

An extractionmethod based on dispersive nanomaterial ultrasound-assisted microextraction was used for the preconcentration of carbofuran and propoxur insecticides in water samples prior to high-performance liquid chromatography with UV detection. ZnS: Ni nanoparticles were synthesized based on the reaction of the mixture of zinc acetate and nickel acetate with thioacetamide in aqueous media and then loaded on activated carbon (ZnS: Ni-AC). Different methods were used for recognizing the properties of ZnS: Ni-AC and then this nanomaterial was used for extraction of carbamate insecticide as new adsorbent. The influence of variables on the extraction method (such as amount of adsorbent (mg: NiZnS-AC), pH and ionic strength of sample solution, vortex and ultrasonic time (min), ultrasound temperature and desorption volume (mL) was investigated by a screening 2(7-4) Plackett-Burman design. Then the significant variables were optimized by using a central composite design combined with a desirability function. At optimum conditions, this method had linear response > 0.0060-10 mu g/mL with detection limit 0.0015 mu g/mL and relative standard deviations < 5.0% (n = 3).
机译：基于分散纳米材料超声辅助微萃取的萃取方法用于水样品中呋喃丹和丙氧磷杀虫剂的预浓缩，然后进行高效液相色谱和紫外检测。 ZnS：Ni纳米粒子是基于醋酸锌和醋酸镍的混合物与硫代乙酰胺在水性介质中的反应合成的，然后负载在活性炭上（ZnS：Ni-AC）。使用不同的方法来识别ZnS：Ni-AC的性质，然后将该纳米材料用于提取氨基甲酸酯杀虫剂作为新的吸附剂。变量对萃取方法的影响（例如吸附剂的量（mg：NiZnS-AC），样品溶液的pH和离子强度，涡旋和超声时间（min），超声温度和解吸体积（mL））筛选2（7-4）Plackett-Burman设计，然后使用中央组合设计结合期望函数优化显着变量，在最佳条件下，该方法的线性响应> 0.0060-10μg / mL，检测限0.0015μg / mL，相对标准偏差<5.0％（n = 3）。

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