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以十六烷基三辛基氟硼酸铵为电活性物质,制备了BF_4~-离子选择性电极。在Na_2SO_4底液中,电极对BF_4~-离子有很好的电位响应。实验考察了共存离子的干扰情况及测定的最佳酸度范围。电极用于仲钨酸铵中硼的测定,将仲钨酸铵中的硼转化为BF_4~-,用标准加入法测定其中硼的含量,结果满意。
BF_4 ~ - ion selective electrode was prepared with cetyltrioctylammonium fluoroborate as electroactive material. In Na_2SO_4 solution, the electrode has a good potential response to BF_4 ~ - ions. Examine the interference of coexisting ions and determine the optimum acidity range. The electrode was used for the determination of boron in ammonium paratungstate. The boron in ammonium paratungstate was converted to BF_4 ~ - and the content of boron was determined by standard addition method. The results were satisfactory.