BF_4~-选择电极测定硼,不仅有较高的灵敏度和很宽的测量范围,而且操作简便、快速、易于掌握。现已用于水、土壤、硼钢、钢铁、硅以及硼硅酸玻璃中硼的测定。我们直接用HF分解试样(铀浓缩物),将硼转化为BF_4~-,用Na_2CO_3掩蔽大量铀,不需进行任何分离,成功地测定了铀浓缩物中的微量硼(>0.002％)。本法硼的回收率为95—103％。 BF_4 ~ - Select the electrode to determine boron, not only has a high sensitivity and a wide measuring range, but also easy to operate, fast, easy to grasp. Has been used for determination of boron in water, soil, boron steel, steel, silicon and borosilicate glass. We directly decomposed the sample (uranium concentrate) with HF, transformed it into BF 4 ~ -, masked a large amount of uranium with Na 2 CO 3, and successfully determined trace boron (> 0.002%) in the uranium concentrate without any separation. The boron recovery rate of 95-103%.