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首页> 外文期刊>RSC Advances >Glycine modified graphene oxide as a novel sorbent for preconcentration of chromium, copper, and zinc ions from water samples prior to energy dispersive X-ray fluorescence spectrometric determination
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Glycine modified graphene oxide as a novel sorbent for preconcentration of chromium, copper, and zinc ions from water samples prior to energy dispersive X-ray fluorescence spectrometric determination

机译：甘氨酸改性石墨烯氧化物作为一种新的吸附剂，用于在能量分散X射线荧光光谱法测定之前从水样中与水样的铬，铜和锌离子的前浓缩

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摘要

A novel and selective sorbent for micro-solid phase extraction was synthesized by chemical functionalization of graphene oxide with glycine. The structure of this nanomaterial, referred to as GO-Gly, was confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. GO-Gly was used for preconcentration of chromium, zinc, and copper ions from water samples prior to their determination by energy dispersive X-ray fluorescence spectrometry (EDXRF). The proposed procedure is based on dispersion of micro amounts of GO-Gly in aqueous samples. After adsorption of metal ions on its surface, samples were filtered under vacuum and then membrane filters were directly submitted to energy dispersive X-ray fluorescence spectrometric measurements. In order to obtain optimal preconcentration conditions, some parameters affecting sorption process, such as pH, amount of GO-Gly, sorption times, and sample volume, were examined. Under optimal conditions the calibration curves were linear in a 1-150 ng mL(-1) range with recoveries higher than 97%. The obtained detection limits for Cr(III), Zn(II), and Cu(II) determinations are 0.15, 0.07, and 0.08 ng mL(-1), respectively. A relative standard deviation of the proposed procedure (at a 10 ng mL(-1) level for n = 10) is lower than 2.3%. The proposed method was successfully applied for determination of Cr(III), Zn(II), and Cu(II) ions in water samples.
机译：微型固相萃取的新颖和选择性吸附剂通过用甘氨酸氧化石墨烯的化学官能化来合成。这种纳米材料的结构，被称为GO - 甘氨酸，用傅立叶确认变换红外光谱，X射线光电子能谱，和扫描电子显微镜。 GO-甘氨酸被其判定由能量色散X射线荧光光谱法（EDXRF）之前用于铬，锌，和铜离子的富集从水样品。所提出的程序是基于含水样品中的微量GO-甘氨酸的分散体。在其表面上的金属离子的吸附后，将样品在真空下过滤，然后膜过滤器被直接提交到能量色散X射线荧光光谱测量。为了获得最佳的预浓缩条件，影响吸附过程的一些参数，例如pH，GO-甘氨酸的量，吸附时间和样品体积，进行了研究。在最佳条件下的校准曲线是在一个1-150毫微克毫升（-1）范围内与回收率高于97％线性的。铬（III），锌（II）和Cu所获得的检测限（II）测定分别为0.15，0.07，和0.08纳克毫升（-1），。所提出的过程的（在10毫升纳克（-1）的水平对于n = 10）的相对标准偏差大于2.3％以下。所提出的方法成功应用于测定铬（III），锌（II）的，和Cu（II）离子水样英寸

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  • 来源
    《RSC Advances》 |2016年第49期|共9页
  • 作者

    Pytlakowska Katarzyna; Kozik Violetta; Matussek Marek; Pilch Michal; Hachula Barbara; Kocot Karina;

  • 作者单位

    Univ Silesia Inst Chem Ul Szkolna 9 PL-40006 Katowice Poland;

    Univ Silesia Inst Chem Ul Szkolna 9 PL-40006 Katowice Poland;

    Univ Silesia Inst Chem Ul Szkolna 9 PL-40006 Katowice Poland;

    Univ Silesia Inst Phys Ul Uniwersytecka 4 PL-40007 Katowice Poland;

    Univ Silesia Inst Chem Ul Szkolna 9 PL-40006 Katowice Poland;

    Univ Silesia Inst Chem Ul Szkolna 9 PL-40006 Katowice Poland;

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  • 正文语种 eng
  • 中图分类 化学;
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