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首页> 外文期刊>Arabian Journal for Science and Engineering >Measuring and Pre‑concentration of Lanthanum Using Fe3_O_4@ Chitosan Nanocomposite with Solid‑phase Microextraction for ICP‑OES Determination
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Measuring and Pre‑concentration of Lanthanum Using Fe3_O_4@ Chitosan Nanocomposite with Solid‑phase Microextraction for ICP‑OES Determination

机译：使用Fe3_O_4 @壳聚糖纳米复合固相微萃取技术测定和预富集ICP-OES

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摘要

A solid-phase microextraction was performed using Fe_3O_4nanoparticle coated with the chitosan, as a green and biodegradablepolymer, for the pre-concentration of La (Ⅲ) in aqueous solutions. The Fe_3O_4magnetic nanoparticles were initiallysynthesized and properly coated with chitosan as adsorbent, and desorption step was successfully conducted using nitricacid. After desorption, analyte was determined with ICP-OES. The effects of different parameters, including pH, nanoparticleamount, concentration and volume of desorption acid, adsorption and desorption time, stirring rate, temperature and salteffect on the microextraction process, were investigated. The calibration curve was plotted, and a linear response range of0.008–0.1 ng L~(−1) with a detection limit of 0.008 ng L~(−1) was obtained. This method was successfully implemented on twosamples of river water, and favorable results were observed.
机译：固相微萃取使用包覆有脱乙酰壳多糖的Fe_3O_4纳米颗粒作为绿色和可生物降解的聚合物进行，以进行La（Ⅲ）在水溶液中的预浓缩。首先合成了Fe_3O_4磁性纳米粒子，并用壳聚糖作为吸附剂进行了适当的包覆，并成功地利用硝酸进行了脱附步骤。解吸后，用ICP-OES测定分析物。研究了pH，纳米粒子的量，解吸酸的浓度和体积，吸附和解吸时间，搅拌速率，温度和盐影响等不同参数对微萃取过程的影响。绘制标定曲线，得出线性响应范围为0.008-0.1 ng L〜（-1），检测极限为0.008 ng L〜（-1）。该方法已成功应用于两个河水样品，并获得了满意的结果。

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