钯(Ⅱ)-亚硝基红盐-氯化十四烷基二甲基苄基铵三元络合物体系膜预富集光度法测定微量钯(Ⅱ)

Spectrophotometric determination of trace palladium(Ⅱ) with ternary complex of Pd(Ⅱ)-nitroso R salt-Zephiramine by preconcentration of a solvent-soluble membrane filter

提出了用可溶性滤膜富集、分光光度法测定痕量钯(Ⅱ)的简便方法。钯(Ⅱ)与亚硝基红盐以及氯化十四烷基二甲基苄基铵形成的三元络合物能够被硝化纤维微孔滤膜定量富集。富集膜溶解在小体积的二甲亚砜中,于420nm处以试剂空白为参比测定吸光度。在5mL溶液中,钯(Ⅱ)含量在0 8～72μg范围内有良好的线性关系。该方法应用于工业废水以及催化剂中钯(Ⅱ)的分析,回收率高,结果满意。

A simple and rapid preconcentration technique,based on collecting trace palladium(Ⅱ) on an organic soluble membrane filter has been describedThe complex of Pd(Ⅱ)-nitroso R salt-Zephiramine can be collected on nitrocellulose membraneThe complex and the filter are dissolved in a small volume of dimethyl sulfoxide,and the absorbance of the resulting solution is measured by means of spectrophotometric method at 420nmBeer's law is obeyed in the range of 08-72μg/5mL for Pd(Ⅱ)The proposed method has been applied to the separation and determination of palladium(Ⅱ) in catalyst and industrial waste water with satisfactory results