金分析除用贵重仪器外,目前尚无一个灵敏度高,选择性好,而又便于推广的方法.TMK比色法虽然灵敏度高,但水相比色不稳定.为此,作者们对混合有机溶剂协同萃取底层显色作了研究.经反复试验最后确定以氯仿:甲基异丁酮:醋酸丁脂为2:1:1混合作为萃取溶剂,获得了满意结果.与目前其它萃取比色相比,不仅提高了 In addition to the expensive gold analytical instruments, there is no high sensitivity, good selectivity, and easy to promote the method .TMK colorimetric method, although the sensitivity is high, but the color is not stable, so the authors mixed organic Solvent collaborative extraction of the underlying color was studied.After repeated experiments and finally determined to chloroform: methyl isobutyl ketone: butyl acetate 2: 1: 1 mixture as the extraction solvent, obtained satisfactory results.Compared with other extraction colorimetric , Not only improved