首页> 外文期刊>International journal of environmental analytical chemistry >High-resolution continuum source flame atomic absorption spectrometric (HR-CS FAAS) determination of trace aluminium and lead in water and some beverage samples after separation and preconcentration procedure
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High-resolution continuum source flame atomic absorption spectrometric (HR-CS FAAS) determination of trace aluminium and lead in water and some beverage samples after separation and preconcentration procedure

机译:分离和浓缩后的高分辨率连续源火焰原子吸收光谱法(HR-CS FAAS)测定水中和某些饮料样品中的痕量铝和铅

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摘要

In the present study, a solid phase extraction procedure has been presented for the separation and preconcentration of aluminium (Al) and lead (Pb) in various matrixes such as water, cola and fruit juice samples. 4-[(3-amino-5-{[(2-hydroxyphenyl) methylidene] amino}-1H-pyra-zol-4-yl) diazenyl] benzoic acid (AHPMAPDAB) was used as a ligand. AHPMAPDAB chelates of Al and Pb ions in aqueous solutions were adsorbed on polystyrene-grafr-ethyl methacrylate copolymer (Poly S_(15)-g-EMA_(120)). Various experimental and analytical parameters such as sample solution pH, sample volume, flow rate of sample solution and eluent, volume and concentration of eluent, amount of ligand and adsorbent, effect of common matrix ions and capacity of adsorbent were investigated. The adsorbed metal ions on resin were eluted with 6 mL of 2 mol L~(-1) HCl solutions and their concentrations were determined by high-resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS). Under the optimised conditions, limits of detections were 0.32 μg L~(-1) and 0.24 μg L~(-1) for Al and Pb, respectively. The accuracy of the procedure was confirmed by analysing certified materials (NIST SRM 1643e, Trace elements in water) and spiked real samples. The developed procedure was successfully applied to real samples.
机译:在本研究中,提出了一种固相萃取程序,用于分离和预浓缩各种基质(例如水,可乐和果汁样品)中的铝(Al)和铅(Pb)。使用4-[(3-氨基-5-{[((2-羟基苯基)亚甲基]氨基} -1H-吡唑-基-4-基)二氮烯基]苯甲酸(AHPMAPDAB)作为配体。水溶液中的Al和Pb离子的AHPMAPDAB螯合物吸附在聚苯乙烯-接枝-甲基丙烯酸乙酯共聚物(Poly S_(15)-g-EMA_(120))上。研究了各种实验和分析参数,例如样品溶液的pH,样品体积,样品溶液和洗脱液的流速,洗脱液的体积和浓度,配体和吸附剂的量,共同基质离子的影响以及吸附剂的容量。用6 mL 2 mol L〜(-1)HCl溶液洗脱树脂上吸附的金属离子,并通过高分辨率连续谱源火焰原子吸收光谱法(HR-CS FAAS)测定其浓度。在优化的条件下,Al和Pb的检出限分别为0.32μgL〜(-1)和0.24μgL〜(-1)。通过分析认证的材料(NIST SRM 1643e,水中的痕量元素)和加标的真实样品,可以确认该方法的准确性。所开发的程序已成功应用于实际样品。

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