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Cr(Ⅵ)与DBC-偶氮胂褪色光度法研究及应用
Spectrophotometric study of the color-fading reaction of chromium (Ⅵ) with DBC-arsenazo and its application
【Abstract】 In the medium of 0.60 mol/L nitric acid,chromium(Ⅵ)reacts with DBC-arsenazo to produce color-fading reaction.Chromium(Ⅵ) was determined based on this reaction.The aqqarent molar absorptivity of the method is ε520nm=2.31×105L·mol-1·cm-1.Beer’s law is obeyed over the range of 1.0-8.0μg/25mL of chromium(Ⅵ).The method was applied to the determination of chromium in the soil samples.
【关键词】 铬(Ⅵ);
褪色光度法;
DBC-偶氮胂;
土壤;
【Key words】 chromium(Ⅵ); color-fading spectrophotometry; DBC-arsenazo; soil;
【Key words】 chromium(Ⅵ); color-fading spectrophotometry; DBC-arsenazo; soil;
- 【文献出处】 化学研究与应用 ,Chemical Research and Application , 编辑部邮箱 ,2004年04期
- 【分类号】O657.3
- 【被引频次】7
- 【下载频次】43