| 催化分光光度法测定油品及催化剂中的痕量铜 |
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| 引用本文： | 刘立行,沈秋英,位秀萍.催化分光光度法测定油品及催化剂中的痕量铜[J].石油化工,1991(10). |
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| 作者姓名： | 刘立行 沈秋英 位秀萍 |
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| 作者单位： | 抚顺石油学院应化系，抚顺石油学院应化系，抚顺石油学院应化系 抚顺 113001，抚顺 113001，抚顺 113001 |
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| 摘 要： | 基于Cu(Ⅱ)能在氨水介质中催化过氧化氢氧化溴酚红褪色的原理,将此催化褪色反应应用于油品及催化剂中痕量铜的测定。利用该法油品经干法灰化后可直接测定;催化剂样品经酸溶后,须先通过巯基棉柱以分离掉样品中的基体元素及干扰元素,再进行测定。加标回收率96—103％,最小检测限为5×10~(-3)μg/25mL。方法简便、快速、灵敏度高。
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Determination of Trace Copper in Petroleum Products and Catalysts by Catalytic Spectrophotometry |
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| Abstract: | The method is based on the principle that Cu (II) catalyzes the decoloration reaction resulting from the oxidation of broinophenol red by hydrogen peroxide in. NH_3·H_2O medium. In this paper, this method is used for determining trace copper in petroleum products and catalysts with satisfactory results. Petroleum products are directly determined after ashing; while the catalysts after acid dissolution arepassed through a column of sulfhydrylated cotton to separate the fundamental and interference elements. The recovery is 96—103%. The detection limit is 5.0 ×10~(-3)μg/25ml. The method has the advantages of rapidity, simplicity and high sensitivity. |
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