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微量铋、铜的催化极谱连续测定,过去末见报导。单独测定铜的催化极谱法已做过一些工作。铋的催化极谱研究,近期有过报导,但由于干扰因素太多,都需进行分离后才能测定。经过试验,我们发现铋、铜在K_2CO_3-EDTA-盐酸羟胺介质中与溴邻苯三酚红(BPR)生成电活性络合物,分别在-0.68V与-0.50V(对饱和甘汞电极)产生一个干扰较少、灵敏度较高、具有吸附特性的吸谱催化波(见图1)。应用于矿石中只需用KF简单沉淀分离Fe、Al等,即可达到铋、铜的连续测定。
Trace bismuth, copper catalytic polarographic continuous determination of the last report. There has been some work done on the catalytic polarographic determination of copper alone. The catalytic polarographic study of bismuth has been reported recently, but due to too many disturbing factors, it needs to be separated before it can be measured. After the experiment, we found that bismuth and copper formed electroactive complexes with bromopyrogallol red (BPR) in the K 2 CO 3-EDTA-hydroxylamine hydrochloride medium at -0.68 V and -0.50 V (for saturated calomel electrode) Produce a less interference, high sensitivity, with absorption characteristics of the absorption spectrum catalytic wave (see Figure 1). Used in ore simply by precipitation KF simple separation of Fe, Al, etc., can be achieved bismuth, copper continuous determination.