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电热氢化物原子吸收测定锑已见于文献。我们利用氢化物发生灵敏度高的特点,试验了岩石土壤中微量锑的测定。据文献我们比较了加入硼氢化钾的不同方式的三种氢化物发生器。结果表明:硼氢化钾由载气带入的发生器最好。其优点是反应快,重现性好,容易清洗,不需要标准磨口和便于自己制作。用本装置发生氢化物原子吸收测锑,灵敏度可达0.0002μg sb/ml/1%吸收。曲线范围0～1μg Sb/50ml,可测定岩石、土壤中ppm级的锑,变动系数为8%。观察了29种元素的干扰行为,若称样0.1g,绝大多数共存元素对锑的测定无影响。
Determination of antimony hydride atomic absorption has been found in the literature. We use the high sensitivity of hydride to test the determination of trace amounts of antimony in rocky soil. According to the literature, we compared three different hydride generators with addition of potassium borohydride. The results show that potassium borohydride is best introduced by carrier gas generator. Its advantage is fast response, reproducible, easy to clean, does not require standard grinding and easy to make their own. With this device hydride atomic absorption measurement of antimony, the sensitivity of up to 0.0002μg sb / ml / 1% absorption. Curve range 0 ~ 1μg Sb / 50ml, can be determined rock, soil ppm level of antimony, coefficient of variation of 8%. The interference behavior of 29 elements was observed. If 0.1g was weighed, the vast majority of coexisting elements had no effect on the determination of antimony.