| 对称二苯基偶氮羰肼光度法测定水样中铬(Ⅵ) |
| 摘要点击 1478 全文点击 1164 投稿时间：1994-10-12 |
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| 中文关键词 对称二苯基偶氮羰肼 吸光光度 铬(Ⅵ) |
| 英文关键词 chromium spectrophotometric sym-diphenylcarbazone |
| DOI 10.13227/j.hjkx.19950419 |
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| 中文摘要 |
| 研究了对称二苯基偶氮碳肼与Cr(Ⅵ)的显色反应,在0.15mol·L-1的硫酸介质中,有十二烷基苯磺酸钠存在下,显色反应灵敏。560nm处,其摩尔吸光系数可达9.74×104,Cr(VI)含量在0—10μg/25ml符合比尔定律,样品加标回收率为95.6%—103.2%,RSD<4.34%。该法用于717型阴离子交换树脂分离富集一光度法测定水样中Cr(VI),结果令人满意。 |
| 英文摘要 |
| Chromium(Ⅵ) was reacted with sym diphenyl-earbazone to form a red complex in the presence of sodium dodecylbenzenesulfonate and 0.05 mol/L of H2SO4 The complex had a maximum absorbance at 560 nm with a molar absorptivity of 9.74×104 L/(mol·cm). Beer's law was obeyed in the range of 0—10 μg of Cr(Ⅵ) in 25 ml solution. The common metal ions were able to be separated and concentrated by amberlite 717,giving a better selectivity. The method has been applied to determining chromium in water samples with satisfactory results. |
