【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^-3μg/25mL。方法简便、快速、灵敏度高。更多还原

【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. NH₃·H₂O 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^-3μg/25ml. The method has the advantages of rapidity, simplicity and high sensitivity.更多还原