【摘要】 在聚乙烯醇(PVA)存在下,铑(Ⅲ)与钨酸盐及番红花T(ST)形成的离子缔合物在480nm处产生最大吸收。据此建立了测定铑(Ⅲ)的光度分析方法,其表观摩尔吸光系数ε达108L.mol-1.cm-1数量级。方法的检测范围为0.15~1.5ng/25ml。大量存在的常见离子对Rh(Ⅲ)的测定不干扰。用此方法测定了催化剂及工业产品中铑的含量,结果与标准方法(SnCl2法)一致。更多还原

【Abstract】 The ion-associated complex formed by rhodium,tungstate and Cotton Red T(ST)in the presence of polyvinyl alcohol(PVA)has a maximum absorbance at 480 nm.A sensitive method for determination of Rh(III)was developed based on this reaction.Its apparent molar absorptivity is more than 108 L.moL-1.cm-1 with a linear range of 0.15-1.5 ng/25ml Rh(III).Other ions in samples did not interfere the determination of rhodium.The results for determination of rhodium in real samples obtained by this method were consistent well with those obtained by SnCl2 method.更多还原