测定Au(Ⅰ)和Cu(Ⅱ)的操作如下:取20毫升(含Cu0.2%m/v,Cu0.1%m/v)试液于烧杯中,稀至约125毫升。用3NHCl调节溶液至所需pH值(测Au时为0.5～1.5,测Cu时为2.0～3.0)。于水浴上加热,搅拌下加入沉淀剂,生成沉淀,并煮1小时。滤出沉淀用热水洗去吸附的沉淀剂,在120℃干燥恒重。该试剂在水溶液中具有适合的 The procedure for the determination of Au (I) and Cu (II) is as follows: Take 20 ml (Cu 0.2% m / v, Cu 0.1% m / v) test solution in a beaker to a minimum of about 125 ml. The solution was adjusted to the desired pH with 3N HCl (0.5-1.5 for Au and 2.0-3.0 for Cu). Heat on a water bath and add the precipitating agent with stirring to produce a precipitate and cook for 1 hour. The precipitate was filtered off and the adsorbed precipitant was washed with hot water and dried at 120 ° C. The reagent is suitable in aqueous solution