| 3,4-二氨基苯甲酸固-液萃取分光光度法测定铂 |
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| 引用本文： | 董彦杰,盖柯,巩新兴.3,4-二氨基苯甲酸固-液萃取分光光度法测定铂[J].宝鸡文理学院学报(自然科学版),2003,23(3):189-194. |
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| 作者姓名： | 董彦杰 盖柯 巩新兴 |
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| 作者单位： | 庆阳师范专科学院,化学系,甘肃,庆阳,745000 |
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| 摘 要： | 以熔融萘作稀释剂,用3,4-二氨基苯甲酸测定Pt是一种有效的分光光度法.Pt与3,4-二氨基苯甲酸(DBA)在90 ℃生成蓝绿色的配合物,在pH 10.0～12.5范围内,配合物定量地被萃取进入熔融萘中.有机相溶解于无水CHCl3中,在715 nm处以试剂为空白测定其吸光度,在Pt浓度为(0.1～2.0)×10-6 mol/L范围内服从比耳定律.摩尔吸光系数和桑德尔灵敏度分别为1.2×106 L/mol*cm和 0.000 41 mg/cm2.实验确定了操作条件,考察了各种干扰离子的影响,并测定了混合样品中的Pt含量.
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| 关 键 词： | 熔融萘 铂 分光光度法 |
Spectrophotometric determination of platinum after solid-liquid extraction with 3,4-diamido-benzoic acid at 90℃ |
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| Abstract.Spectrophotometric determination of platinum after solid-liquid extraction with 3,4-diamido-benzoic acid at 90℃[J].Journal of Baoji College of Arts and Science(Natural Science Edition),2003,23(3):189-194. |
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| Authors: | Abstract |
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| Abstract: | An effective spectrophotometric determination of platinum with 3,4-diamido-benzoic acid (DBA) using molten naphthalene as a diluent has been studied. A blue-green complex of platinum with DBA is formed at 90 ℃. In the range of pH 10.0～12.5, the complex is quantitatively extracted into molten naphthalene. The organic phase is anhydrously dissolved in CHCl3 to be determined spectrophotometrically at 715 nm against the reagent blank. Beer's law is obeyed over the concentration range of (0.1～2.0)×10-6. The molar absorptivity and Sandell's sensitivity 1.2×106 L/mol*cm and 0.000 41 mg/cm2 respectively. The optimum conditions for determination are obtained. The interferences of various ions are observed in detail. The method has been applied to the determination of platinum in synthetic samples. |
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| Keywords: | molten naphthalene platinum spectrophotometric |
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