基于在稀盐酸介质中 ,钨 (Ⅵ )催化Ti(Ⅲ )还原孔雀绿褪色的反应 ,建立了催化动力学光度法测定痕量钨的新方法 .方法的线性范围为 0～ 0 .8μg/mL ,检出限为 1.1× 10 - 8g/mL .本方法简便快速、选择性好 ,用于几种钨矿石样品的测定 ,取得了令人满意的结果 ,并对反应的机理进行了探讨 A new method for the determination of trace tungsten by catalytic kinetic spectrophotometry was established based on the reaction of Ti (Ⅲ) -reducing Ti (Ⅲ) reduction of malachite green in dilute hydrochloric acid. The linear range of the method is 0 ~ 0.8μg / mL , The detection limit is 1.1 × 10-8g / mL.The method is simple, rapid and selective, and is applied to the determination of several tungsten ore samples with satisfactory results. The reaction mechanism is also discussed