| 硫氰酸盐-吖啶红-阿拉伯胶光度法在水相中测定镍钼矿中微量钼(Ⅵ) |
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| 引用本文： | 姚康康,曾云,王影,覃事栋.硫氰酸盐-吖啶红-阿拉伯胶光度法在水相中测定镍钼矿中微量钼(Ⅵ)[J].光谱实验室,2012,29(1):439-442. |
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| 作者姓名： | 姚康康 曾云 王影 覃事栋 |
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| 作者单位： | 吉首大学化学化工学院 416000 |
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| 摘 要： | 以抗坏血酸-硫脲为还原剂,在稀硫酸中Fe(Ⅲ)催化还原钼(Ⅵ)为钼(Ⅴ),并与硫氰酸盐形成配阴离子,在阿拉伯胶存在下与碱性阳离子染料吖啶红形成离子缔合物.其最大吸收波长为553nm,表观摩尔吸光系数为ε=2.7×105L·mol-1·cm-1,钼(Ⅴ)质量浓度在0.0017-80μg ·mL-1范围内服从比耳定律.适量酒石酸-草酸-柠檬酸水溶液可消除干扰离子的影响.用此方法在水相中直接测定镍钼矿中微量钼.
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| 关 键 词： | 分光光度法 钼(Ⅵ) 吖啶红 硫氰酸盐 |
Determination of Micro Molybdenum in Ni-Mo Ore in Aqueous Phase by Thiocyanate-Acridine Red-Arabic Gum Spectrophotometry |
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| YAO Kang-Kang
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ZENG Yun
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WANG Ying
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QIN Shi-Dong.Determination of Micro Molybdenum in Ni-Mo Ore in Aqueous Phase by Thiocyanate-Acridine Red-Arabic Gum Spectrophotometry[J].Chinese Journal of Spectroscopy Laboratory,2012,29(1):439-442. |
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| Authors: | YAO Kang-Kang ZENG Yun WANG Ying QIN Shi-Dong |
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| Institution: | (College of Chemistry and Chemical Engineering,Jishou University,Jishou,Hunan 416000,P.R.China) |
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| Abstract: | Mo（Ⅵ） was catalyzed and reduced to Mo（Ⅴ） by Fe（Ⅲ） in sulfuric acid solution with ascorbic acid-sulfocarbamide as reducing agent,and theMoO（SCN）5]2- complex anion was formed in an excess of thiocyanate,and the alkaline cationic dye acridine red-MoO（SCN）5]2- ion-association complex was produced in the presence of Arabic gum and alkaline cationic dye acridine red.This ion-association complex has the maximum absorbance wavelength at 553nm,and its apparent molar absorptivity is 2.7×105L · mol-1·cm-1.Beer’ s law was obeyed in the range of 0.0017—80μg · mL-1 for the mass concentration of Mo（Ⅴ）.The effects of interfering ions were eliminated by the mixed masking agent of tartaric acid-oxalic acid-citric acid.Trace Mo（Ⅵ） in nickelmolybdenum ore can be directly determined in aqueous phase by the method. |
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| Keywords: | Spectrophotometry Molybdenum(Ⅵ) Acridine Red Thiocyanate |
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