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題 名 | Colorimetric Determination of Selenium in Various Environmental Samples |
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作 者 | Chatterjee,Sukumar; Pillai,Ajai Kumar; Gupta,Vinay Kumar; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 48:1 2001.02[民90.02] |
頁 次 | 頁33-36 |
分類號 | 345.147 |
關鍵詞 | 比色; 硒; Colorimetry; Rhodamine-B dye; Selenium (iv) determination; Environmental and cosmetic samples; |
語 文 | 英文(English) |
英文摘要 | A new reagent system using rhodamine-B dye for the determination of selenium is described. The method is based on the reaction of selenium with acidified potassium iodide to liberate iodine. The liberated iodine bleaches the pink colour rhodamine-B, which is measured at 555 nm. Beer!|s law is obeyed over the concentration range of 1-10 mg of selenium final solution volume of 25 mL (0.04-0.4 ppm) and the apparent molar absorptivity and Sandell!|s sensitivity was found to be 1.96 ’ 105 l mol-1 cm-1 and 0.0004 mg cm-2, respectively. The method is simple, sensitive, and selective and is satisfactorily applied to micro-level determination of selenium in various environmental and cosmetic samples. |
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