硒的分析方法很多,在矿石分析中一般采用比色法,其中较普遍的方法是在保护胶存在下,用二氯化锡将硒还原成元素状态进行比色测定。由于汞能被二氯化锡还原生成与硒相似的胶体,对硒的测定发生干扰,因此在用二氯化锡作还原剂时汞要预先分离。柴可夫斯基(Ф.В.Зайковский)提出用甲醛在脱硝时,将汞、金、银还原成元素状态;以抗坏血酸作还原剂进行硒的测定。我们在柴可夫斯基方法的基础上,进行了汞矿中硒的测定方法试验,发现在甲醛脱硝过程中汞的还原作用不完全。后来我们在抗坏血酸还原硒的过程中, Many methods of selenium analysis, the ore analysis is generally used colorimetric method, the more common method is to protect the presence of plastic, with tin dichloride selenium reduction elemental colorimetric determination. Since mercury can be reduced by stannic chloride to form a colloid similar to selenium, which interferes with selenium determination, mercury is pre-separated when tin dichloride is used as a reducing agent. Tchaikovsky (Ф.В.Зайковский) proposed using formaldehyde in the denitration, the mercury, gold and silver reduced to the elemental state; ascorbic acid as a reducing agent for the determination of selenium. Based on the Tchaikovsky method, we carried out a test on the determination of selenium in mercury ores. It was found that mercury was not completely reduced during the denitration of formaldehyde. Later, we in the process of reducing ascorbic acid selenium,