摘要
本文提出了以二苯硫腙四氯化碳溶液的萃取剂,通过固定萃取时间来控制二苯硫腙与水相中Cr(Ⅵ)的反应程度,以比色法测定痕量Cr(Ⅵ)的非催化萃取动力学新方法。该方法在1～2mol/LHCl介质中,灵敏度为0.1ppmCr(Ⅵ),线性范围为0.1～1.5ppmCr(Ⅵ),干扰离子可在pH6～7条件下用二苯硫腙的四氯化碳溶液萃取分离和用甲基异丁基酮在1mol/LHCl介质中萃取分离。该法应用于镀铬车间废水中铬(Ⅵ)的测定,结果满意。
In this paper, the non-catalytic extraction kinetic determin ation of trace chrominum(VI) in 1～2mol / L hydrochloric acid medium with dithizoneCCl_4 solution as extractant was studied by means of spectrophotometry. The sensitivity of this method is 0.1ppm chromium(VI), and the linear range is between 0.1 and 1.5 ppm chromium(VI). The interfering ions can be separated from chromium(VI) by extraction with dithizone-CC1_4 solution at pH 6～7 or by extraction with methyl isobutyl ketone from 1mol/L hydrochloric acid medium. Chromium(VI) in waste water was determined by this method, and satisfactory results were obtained.
出处
《分析试验室》
CAS
CSCD
北大核心
1990年第3期13-15,19,共4页
Chinese Journal of Analysis Laboratory
