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钡是一个很难还原的元素,所以钡的极谱研究报道的不多。在实验中我们发现在氢氧化四甲铵的溶液中,钡离子有一灵敏的极谱波,检测限可达3×10~(-7M)。该方法所需底液简单,操作方便,快速。将此法于硫酸钡溶度积的测定,结果满意。仪器和试剂:JP-1A型示波极谱仪,三电。极导数档,82-1型新示波伏安仪。钡标准溶液:(1mgBa/ml):用BaCl_2·2H_2O(AR)按常规配制,实验用水为二次石英重蒸馏水;1.25％氢氧化四甲铵溶液(上海试剂厂,AR)以上溶液均保存在塑料瓶中。
Barium is a very difficult element to be reduced, so barium polarographic studies have reported little. In the experiment, we found that in the tetramethylammonium hydroxide solution, the barium ion has a sensitive polarographic wave with a detection limit of up to 3 × 10 ~ (-7M). The method of the bottom liquid is simple, easy to operate, fast. The method of barium sulfate solubility product determination, the results are satisfactory. Instruments and reagents: JP-1A oscilloscope, three electricity. Very derivative, 82-1 new oscilloscope voltammetry. Barium standard solution: (1mgBa / ml): BaCl2_2H2O (AR) was prepared according to the conventional method. The experimental water was twice quartz distilled water; 1.25% tetramethylammonium hydroxide solution (Shanghai Reagent Factory, AR) Plastic bottle.