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本文研究了三辛基氧化膦(TOPO)化学修饰电极预富集石墨炉原子吸收法测定水样中痕量锑。水中痕量锑被电解还原蓝电积在TOPO修饰的钨电极上,然后放入石墨杯中直接原子化。锑的测定线性范围1.0—20ng/mL,含10ng/mL锑的溶液九次平行测定,变异系数为3.1％,捡出限为0.1ng/mL,24种共存离子及有机物不干扰测定。方法灵敏、简便、并用于一些水样的测定,得到满意的结果。
In this paper, three-octylphosphine oxide (TOPO) modified electrode preconcentration graphite furnace atomic absorption spectrometry determination of trace antimony in water samples. Trace antimony in water was electrolytically reduced to a blue electrode on the TOPO modified tungsten electrode, which was then directly atomized into a graphite cup. The determination of antimony linear range of 1.0-20ng / mL, 10ng / mL antimony solution nine parallel determination, coefficient of variation of 3.1%, the detection limit of 0.1ng / mL, 24 kinds of coexisting ions and organic matter does not interfere with the determination. The method is sensitive, simple, and used in the determination of some water samples, and get satisfactory results.