论文部分内容阅读
由于贵金属具有优良的抗腐蚀性、高温抗氧化性、良好的催化作用、强的电火花蚀耗性、稳定的热电性及高磁化率等优良性能,因而在科研、国防、航天、石油、化工及电子工业等广泛领域中都有很重要的应用。如贵金属有机化合物在治癌方面的探讨、贵金属催化废气转换器在汽车上的应用,环境保护及贵金属废料回收流程的研究等等,促进了痕量贵金属分析方法的发展、同时也推动了对用来作为标准溶液的痕量贵金属溶液稳定性的实验研究。因为一旦用作标准溶液的浓度改变,则试样的测定也归于失败;此外,在天然雨、雪、冰及海水等水样的采集储存中,人们已认识到容器壁对水中痕量金属离子的吸附损失,随着生产技术的迅速发展要求测定的限量更低,因此阻止水样中金属离子在容器壁上吸附的损失已越
As a precious metal with excellent corrosion resistance, high temperature oxidation resistance, good catalytic effect, strong spark erosion, stable thermoelectric properties and high magnetic susceptibility and other excellent performance, so in the research, defense, aerospace, petroleum, chemical And the electronics industry in a wide range of areas have very important applications. Such as the study of precious metal organic compounds in cancer treatment, the application of precious metal catalytic converter in automobiles, the research of environmental protection and precious metal scrap recovery process, etc., promoted the development of trace precious metal analysis methods and also promoted the use of As a standard solution of trace precious metals solution stability of the experimental study. Since once the concentration of the standard solution is changed, the determination of the sample also fails. In addition, in the collection and storage of water samples such as natural rain, snow, ice and sea water, it has been recognized that the influence of the container wall on the trace metal ions Of the adsorption loss, with the rapid development of production technology requires a lower limit of determination, thus preventing the loss of water adsorption of metal ions in the container wall has been more