在某些感光材料的乳剂中含有少量的镉离子对其照相性能影响极大。因此测定镉的含量有很重要的意义。曾有人应用镉离子电极来测定各种样品中的镉含量。但用悬汞电极测定含镉感光材料AgX乳剂及其废水中的镉含量则未见报导,本文就是利用悬汞电极的循环伏安法来测定AgX乳剂及其废水中的镉含量,具有干扰少,操作简单,灵敏度高,重复性好的特点,有普遍推广应用的价值。 In some photosensitive materials, the emulsion contains a small amount of cadmium ion photographic performance of its great influence. Therefore, the determination of cadmium content is very important. Cadmium ion electrode has been used to determine the cadmium content of various samples. However, there is no report about the determination of cadmium content in cadmium-containing AgX emulsion and wastewater by hanging mercury electrode. In this paper, the cyclic voltammetry of mercury-suspended electrode was used to determine the content of cadmium in AgX emulsion and its wastewater with less interference , Simple operation, high sensitivity, good reproducibility, there is a universal value of the promotion.