非鉄金属製錬における工程管理分析の迅速化及び高度化に関する研究
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The current state of analysis for process-control is considered to be insufficient to overcome severe demands on rapidity, precision and cost-performance. This thesis presents several analytical techniques for applications in nonferrous metal-refining industry. Flow-injection (FI) techniques in combination with a spectrophotometric method were developed for the determination of copper. cadmium and cobalt in hydrometallurgical zinc. In this FI technique, several new devices were developed for the overall automation of the process control, including a method utilizing a non-dispersion sample zone, a correction method for system variation, an on-line matrix separation by mini-column anion-exchange and a computer-controlled variable-volume injector. In addition, ICP-MS with on-line anion-exchange matrix separation was developed for determining of trace impurities in ultra-high-purity zinc metal. In the field of copper refining, for the determination of Sb(III, V) in copper electrolyte. HPLC/ICP-AES was developed. A cation exchange column with a mobile phase of thiourea was used to separate Sb(III) from Sb(V). Ultrasonic nebulization ICP-AES for trace impurities in high-purity copper was also studied. A separation method using indium co-precipitation for metal impurities and electrolytic deposition for sulfur, in copper metal were developed. Furthermore, a method based on first-derivative spectrophotometry for the simultaneous determination of rare-earth elements was also developed. In conclusion, a variety of rapid and high-performance analytical techniques concerning the non-ferrous metal-refining industry have been developed and successfully applied to process and quality control.
- 社団法人日本分析化学会の論文
- 1997-05-05
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