研究用双(正辛基亚磺酰)乙烷的乙酸丁酯溶液在盐酸介质中萃取金的性能.实验表明只有在KBr存在下于01～6mol/LHCl介质能定量萃取金,酸性硫脲溶液可将金定量反萃并用结晶紫分光光度法测定金.大量Fe3+,Cu2+,Ni2+,Sb(Ⅴ)等20余种贱金属和贵金属不干扰.斜率法、紫外和红外光谱研究萃合物组成和萃取机理.方法具有简便、准确、选择性高,可应用于矿物中微量金的测定. In this paper, the extraction of gold from hydrochloric acid with butyl acetate solution of bis (n-octylsulfinyl) ethane was studied.The results show that gold can be extracted quantitatively only in the presence of KBr in the presence of KBr, the acidic thiourea solution Gold can be quantitatively back-extracted and the gold can be determined by crystal violet spectrophotometry.More than 20 kinds of base metals such as Fe3 +, Cu2 +, Ni2 +, Sb (Ⅴ) and noble metals do not interfere with each other.The slope composition, UV and IR spectra were used to study the composition and Extraction mechanism.The method is simple, accurate and highly selective and can be applied to the determination of trace gold in minerals.