首页> 外文期刊>Analytica chimica acta >Selective adsorption,pre-concentration and matrix elimination for the determination of Pb(II),Cd(II),Hg(II) and Cr(III) using l,5,9,13-tetrathiacyclohexadecane-3,11-diol anchored poly (p-chloromethylstyrene-ethyleneglycoldimethacrylate) microbeads
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Selective adsorption,pre-concentration and matrix elimination for the determination of Pb(II),Cd(II),Hg(II) and Cr(III) using l,5,9,13-tetrathiacyclohexadecane-3,11-diol anchored poly (p-chloromethylstyrene-ethyleneglycoldimethacrylate) microbeads

机译:使用1,5,9,13-四硫代环十六烷-3,11-二醇锚定的多聚体的选择性吸附,预浓缩和基质消除法测定Pb(II),Cd(II),Hg(II)和Cr(III) (对氯甲基苯乙烯-亚乙基二甲基甘醇二甲基丙烯酸酯)微珠

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摘要

Poly(p-chloromethylstyrene-ethyleneglycoldimethacrylate) polymeric microbeads,poly(p-CMS-EGDMA),were synthesized and 1,5,9,13-tetrathiacyclohexadecane-3,11 -diol (S4HD) was attached chemically onto the polymeric microbeads.Characterization of all microbeads was done by Fourier transform-infrared spectrometry (FT-IR) and elemental analyzer.The amount of attached 1,5,9,13-tetrathiacyclohexadecane-3,11-diol to the polymer was found to be 2.23mmolg~(-1) polymers.The ligand attached microbeads,poly(p-CMS-EGDMA-S4HD),were used to examine the adsorption capacity of Pb(II),Cd(II),Hg(II) and Cr(II) ions for recovery,pre-concentration and the matrix elimination by changing the pH and the initial metal ion concentrations and also adsorption kinetics of the studied metal ions was determined.Pre-concentration factors for the studied toxic metal ions were found to be more than 500-fold and recovery was between 92 and 106%.In the drinking,lake,tap and sea-water samples from water lands,ultra-trace toxic metal ion concentrations were determined easily by using ligand modified microbeads after pre-concentration because of the high pre-concentration factor and easily matrix elimination using ligand modified microbeads.Reference sea-water material was used for the validation of the method and it was found that recovery,pre-concentration and the matrix elimination were performed perfectly.For the desorption of the toxic metal ions,3 M HC1 containing 0.8 M thiourea was used and desorption ratio was obtained more than 96%.
机译:合成了聚(p-氯甲基苯乙烯-亚乙基二甲基乙二醇二甲基丙烯酸酯)聚合物微珠,并合成了1,5,9,13-四硫代环十六烷-3,11-二醇(S4HD),并将其化学连接到该聚合物微珠上。通过傅立叶变换红外光谱(FT-IR)和元素分析仪测定所有微珠的含量,发现聚合物上附着的1,5,9,13-四硫代环十六烷-3,11-二醇的含量为2.23mmolg〜( -1)聚合物。用配体连接的微珠poly(CMS-EGDMA-S4HD)检测Pb(II),Cd(II),Hg(II)和Cr(II)离子的吸附能力。通过改变pH值和初始金属离子浓度来回收,预浓缩和消除基质,并确定了所研究金属离子的吸附动力学。发现所研究有毒金属离子的预浓缩因子超过500倍回收率在92%到106%之间。在水域的饮用水,湖泊,水龙头和海水样本中,超痕量由于预富集系数高,并且通过配体修饰的微珠易于去除基质,因此在预浓缩后使用配体修饰的微珠可轻松确定金属离子的浓度。使用参考海水材料对该方法进行了验证,发现对于有毒金属离子的解吸,使用含0.8 M硫脲的3 M HCl进行解吸,解吸率大于96%。

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