Determination of Antimony in Water by Electrothermal Atomic Absorption Spectrometry after Preconcentration on a Membrane Filter with a Finely Pulverized Anion-Exchange Resin
Determination of Antimony in Water by Electrothermal Atomic Absorption Spectrometry after Preconcentration on a Membrane Filter with a Finely Pulverized Anion-Exchange Resin
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细粉阴离子交换树脂膜过滤器预浓缩后电热原子吸收光谱法测定水中锑
DOI：
10.2116/analsci.15.1033
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发表时间：
1997
影响因子：
1.6
通讯作者：
Shigemitsu Umeki
中科院分区：
文献类型：
--
作者：
J. Shida;Shigemitsu Umeki
建立了一种电热原子吸收光谱分析水样中镓的灵敏方法。在20-500ml的样品溶液中，镓(10-60)ng以邻苯二酚紫络阴离子形式在pH为5的树脂上保留；所得树脂通过膜过滤。将带有膜过滤器的树脂的一部分(直径3 mm)插入试管，在294.4 nm处测量镓的吸光度。在镓含量为30 ng时，5次测定的相对标准偏差为5%。方法的检出限为500毫升(3ngGa L-1)水样中1.5 ng的镓。研究了各种离子的干扰，建立了测定矿井水和河水样品中镓的最佳条件。
A sensitive method based on preconcentration on a membrane filter with a finely pulverized anion-exchange resin has been developed for the determination of gallium in water samples by electrothermal atomic absorption spectrometry. Gallium (10-60)ng, in 20-500ml of a sample solution, was retained as a Pyrocatechol Violet complex anion on a resin at pH 5; the resulting resin was filtered through a membrane filter. A portion of the resin with the membrane filter (3mm in diameter) was inserted into a cuvette, and the absorbance of gallium was measured at 294.4nm. The relative standard deviations for five measurements at 30ng of gallium was 5%. The detection limit was 1.5ng of gallium in 500ml (3ngGa l-1) of the water sample. The interference of various ions was studied, and the optimum conditions were developed for the determination of gallium in mine-drainage and river-water samples.