论文部分内容阅读
用离子选择电极测定氧化铍中的钾、钠,与常用的火焰光度法相比,不仅方法简便,而且能避免大量剧毒的铍蒸汽排入空气中,大大改善了分析条件,减小空气污染。 1.实验结果: (1)以稀盐酸浸出氧化铍中钾、钠,使之与大量基体得以分离。 (2)以10％乙酰丙酮或磺基水杨酸络合铍,能在较高的pH值下顺利地进行测定;电极响应情况与纯标准溶液相同。钠的测量下限为10~(-5)M,钾的测量下限为10~(-4.5)M。 (3)在实验条件下,分别测得钠电极对钾的选择比为5.1 对铍的选择比为8250,钾电极对钠的
Determination of potassium and sodium in beryllium oxide by ion-selective electrode is not only simple and convenient, but also avoids the release of a large amount of toxic beryllium vapor into the air, greatly improving the analysis conditions and reducing air pollution compared with the conventional flame photometry. 1. Experimental results: (1) Leaching dilute hydrochloric acid beryllium potassium, sodium, so that with a large number of matrix to be separated. (2) Beryllium complexed with 10% acetylacetone or sulfosalicylic acid can be successfully measured at a higher pH value; the electrode response is the same as the pure standard solution. The lower limit of sodium measurement is 10 ~ (-5) M and the lower limit of potassium measurement is 10 ~ (-4.5) M. (3) Under the experimental conditions, the selectivity ratio of sodium electrode to potassium was 5.1, the selectivity ratio of beryllium to 8250, potassium electrode to sodium