论文部分内容阅读
原子吸收法测定高纯碱金属及其盐类中的微量钙,由于基体效应和其他共存元素的干扰,无法达到足够的准确度和灵敏度。我们在实验中采用萃取分离的方法,探讨了测定碱金属及其盐类中微量钙的条件。实验表明,在pH=12的情况下,用8-羟基喹啉-异戊醇溶液一次萃取可以定量萃取钙。然后将有机相直接喷入空气-乙炔火焰中,可检出0.08微克/毫升的钙,相对误差为10—15％。方法简便快速,可同时消除基体和杂质的干扰。我们对8-羟基喹啉的用量,pH范围和有机相
Determination of trace amounts of calcium in high-purity alkali metals and their salts by atomic absorption spectroscopy fails to achieve sufficient accuracy and sensitivity due to matrix effects and other coexisting elements. We used the method of extraction and separation in the experiment to explore the determination of trace amounts of calcium in alkali metals and their salts. Experiments show that in the case of pH = 12, 8-hydroxyquinoline - isoamyl alcohol solution extraction can be quantitative extraction of calcium. The organic phase was then injected directly into the air-acetylene flames, which detected 0.08 μg / ml calcium with a relative error of 10-15%. The method is quick and easy, eliminating the interference of matrix and impurities. We use 8-hydroxyquinoline, pH range and organic phase