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Application of polyethylene glycol-coated iron oxide nanoparticles for magnetic solid phase extraction of copper from seawater samples and its determination by graphite furnace atomic absorption spectrometry using response surface methodology for optimization of extraction
Spectroscopy Letters ( IF 1.7 ) Pub Date : 2021-05-31 , DOI: 10.1080/00387010.2021.1926285
Zahra Khayyat-Sarkar 1 , Sayyed Hossein Hashemi 2 , Ahmad Jamali Keikha 3 , Massoud Kaykhaii 1
Affiliation  

Abstract

In this research, a novel solid phase extraction method combined with graphite furnace atomic absorption spectrometry has been employed for the extraction and trace determination of copper in tap and seawater samples. The technique was based on poly ethylene glycol-coated iron oxide nanoparticle as adsorbent for solid phase extraction of copper ions. Optimal conditions including pH, extraction and desorption time, concentration and volume of eluent, temperature, volume of sample, amount of PEG and sorbent were investigated and optimized using both the one-variable-at-a-time method and response surface methodology. Under the optimal experimental conditions, the calibration graph was linear in range of 0.5–125.0 µg/L with detection limit of 6 ng/L. Good enrichment factor of 121 folds for the analyte was obtained. The repeatability of the method was satisfactory (RSD ≤ 4.8%). Finally a few seawater samples of Chabahar Bay (Southeast Iran) were analyzed successfully with proposed procedure.



中文翻译:

聚乙二醇包覆氧化铁纳米粒子在海水样品中铜的磁性固相萃取及其响应面法石墨炉原子吸收光谱法测定萃取优化中的应用

摘要

本研究采用新型固相萃取法结合石墨炉原子吸收光谱法对自来水和海水样品中的铜进行萃取和痕量测定。该技术基于聚乙二醇包被的氧化铁纳米颗粒作为吸附剂用于铜离子的固相萃取。优化条件包括 pH、提取和解吸时间、洗脱液的浓度和体积、温度、样品体积、PEG 和吸附剂的量,使用一次一个变量方法和响应面方法进行研究和优化。在最佳实验条件下,校准图在 0.5–125.0 µg/L 范围内呈线性,检出限为 6 ng/L。获得了分析物 121 倍的良好富集因子。该方法的重复性令人满意(RSD ≤ 4.8%)。最后,使用建议的程序成功分析了恰巴哈尔湾(伊朗东南部)的一些海水样本。

更新日期:2021-06-25
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