硫酸镍中测定痕量镉,在试剂标准中用萃取光度法,即是将大量镍萃取除去后,在氰化钾存在下,用双硫腙萃取分光光度法测定,此法劳动强度大,浪费试剂和时间,易引入杂质,且灵敏度不高,特别是要用剧毒试剂,给分析工作带来困难,近年来有用原子吸收光度法,由于仪器较贵,目前难以推广,用极谱溶出法或催化法,虽有不少测定痕量镉的报导,但测定硫酸镍中痕量镉,由于百万倍镍的干扰,往往需分离后才能测定,我们通 Determination of trace amounts of cadmium nickel sulfate, the reagent standard extraction spectrophotometry, that is, after a large number of nickel extraction removed in the presence of potassium cyanide dithizone extraction spectrophotometric determination of labor-intensive, wasteful Reagents and time, easy to introduce impurities, and the sensitivity is not high, especially to use highly toxic reagents, to the analysis difficult, useful atomic absorption spectrometry in recent years, due to the equipment is more expensive, it is difficult to promote the use of polarographic dissolution Or catalytic method, although there are many reports of the determination of trace cadmium, but the determination of trace amounts of cadmium sulfate nickel, due to millions of times the interference of nickel, often after separation to determine, we pass