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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >On-line preconcentration and determination of trace metals using a flow injection system coupled to ion chromatography
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On-line preconcentration and determination of trace metals using a flow injection system coupled to ion chromatography

机译:在线预浓缩和使用与离子色谱联用的流动注射系统测定痕量金属

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摘要

A flow injection (FI) method with on-line preconcentration using a mini-column loaded with 8-hydroxyquinoline immobilized on controlled pore glass (CPG-8HQ) is described for the determination of trace metals by ion chromatography (IC) with pyridine-2-6-dicarboxylic acid (PDCA) as the eluent. Copper, cadmium, lead, zinc, nickel and iron were determined at ppb level after post-column derivatization with 4-(2-pyridylazo)-resorcinol (PAR). The detection limits (3σ) for the FI/IC system were 8.27, 0.89, 0.09, 0.06, 0.09 and 0.07 g 1~(-1) for Pb~(2+), Cd~(2+), Cu~(2+) Ni~(2+), Zn~(2+) and Fe~(3+), respectively, using 5 ml sample volume. The method was applied to the analysis of Malaysian natural waters.
机译:描述了一种流动注射(FI)方法,该方法使用固定在受控孔玻璃(CPG-8HQ)上的装有8-羟基喹啉的微型色谱柱进行在线预浓缩,用于通过吡啶-2离子色谱法(IC)测定痕量金属-6-二羧酸(PDCA)作为洗脱液。在用4-(2-吡啶基偶氮)-间苯二酚(PAR)进行柱后衍生化之后,以ppb含量测定铜,镉,铅,锌,镍和铁。 FI / IC系统的检出限(3σ)为Pb〜(2 +),Cd〜(2 +),Cu〜(2)的8.27、0.89、0.09、0.06、0.09和0.07 g 1〜(-1) +)分别使用5 ml样品体积的Ni〜(2 +),Zn〜(2+)和Fe〜(3+)。该方法用于马来西亚天然水的分析。

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