粗铜中的金分布不匀,其量又微,因此需多称样,分离富集后,用光谱法、原子吸收光谱法、光度法或容量法测定之。我们利用金不溶于一般氧化性酸的性质,用硝酸将铜等分离而使金富集于残渣中。继用王水溶解,使成[AuCl_4]~-后,用碱性染料,如孔雀绿及甲苯进行萃取光度测定。 Blister copper in the uneven distribution of the amount of micro-and therefore need to weigh more like, after separation and enrichment, using spectroscopy, atomic absorption spectrometry, photometry or volumetric method of determination. We use the nature of the gold does not dissolve in the general oxidation of the acid, the separation of copper and other nitrate with gold enrichment in the residue. Following the use of aqua regia to make into [AuCl_4] ~ -, with alkaline dyes, such as malachite green and toluene extraction spectrophotometry.