论文部分内容阅读
测定钢铁中的铜,主要使用硫化物沉淀电解重量法、硫代硫酸钠重量法、EDTA容量法、比色法、经典极谱法、离子选择电极法、阳极溶出伏安法等。但是,这些方法有的需要经过繁琐的分离手续,或者需要特殊试剂,因此在某些情况下难于使用。本文在对铜——硫氰酸根络合物在卧汞电极上的行为进行探讨的基础上,提出以O.24N硫酸+0.08％硫氰酸钾+0.8％盐酸羟胺为支持电解质,在卧汞电极上,以阴极溶出伏安法直接测定钢铁中铜含量的新方法。本法不需分离,不用特殊试剂,测定灵敏度高,适应范围广,方法简单,是测定钢铁中铜含量,尤其是铬含量较高的合金钢中铜含量测定的一种好方法。
Determination of copper in steel, the main use of sulfide precipitation gravimetric method, sodium thiosulfate gravimetric method, EDTA volumetric method, colorimetry, classical polarographic method, ion-selective electrode method, anodic stripping voltammetry. However, some of these methods require cumbersome procedures for separation or require special reagents, making them difficult to use in some cases. Based on the investigation of the behavior of copper-thiocyanate complex on the horizontal mercury electrode, this paper proposed that with O.24N sulfuric acid + 0.08% potassium thiocyanate + 0.8% hydroxylamine hydrochloride as supporting electrolyte, Electrode, cathodic stripping voltammetry direct determination of the new method of copper content in steel. This method does not require separation, no special reagents, high sensitivity, wide adaptability, simple method, is a good method for the determination of copper content in steel, especially in the determination of copper content in alloy steel with high chromium content.