论文部分内容阅读
金属离子-水杨基萤光酮(SAF)-溴化十六烷基三甲基铵(CTMAB)三元络合体系已用于钛、锆、铬等的光度测定,但未见用于钯的测定。本文研究了Pd(Ⅱ)-SAF-CTMAB三元络合物显色反应的条件。该反应的灵敏度高(ε=1.17×10~5),是目前水相测定钯高灵敏度的方法之一。经巯基棉分离干扰离子,能显著提高反应的选择性。已用于测定钯催化剂和钯废水中的微量钯,结果较为满意。 1.仪器和主要试剂: 721型分光光度计;UV-300型自记分光光度计。钯(Ⅱ)标准溶液:准确称取纯钯0.1000g,加热溶于王水,加20％NaCl 10滴,蒸至近
The metal ion-salicylfluorone (SAF) -tetramethyltrimethylammonium bromide (CTMAB) ternary complex system has been used for the photometric determination of titanium, zirconium, chromium and the like but has not been used for the determination of palladium . In this paper, the conditions for the color reaction of Pd (Ⅱ) -SAF-CTMAB ternary complexes were studied. The sensitivity of this reaction is high (ε = 1.17 × 10 ~ 5), which is one of the most effective methods for the determination of palladium in aqueous solution. The separation of interference ions by thiol cotton can significantly improve the selectivity of the reaction. Has been used for the determination of palladium catalyst and palladium in trace amounts of palladium, the results are more satisfactory. 1. Instruments and main reagents: 721 spectrophotometer; UV-300 self-recording spectrophotometer. Palladium (Ⅱ) standard solution: accurately weighed pure palladium 0.1000g, dissolved in aqua regia, add 20% NaCl 10 drops, steamed to near