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金属铊中杂质的分析,一般采用在盐酸或溴氢酸介质中用甲基异丁酮或乙醚萃取分离铊,再用化学法、化学光谱法或硝酸铊粉末法进行光谱分析。前二者流程长、成本高,后者灵敏度低,毒性大。我们实验了硝酸铊结晶沉淀分离大部分铊后,于上层清液中测定硝酸可溶性杂质。此法成本低,灵敏度高、毒性小,3—4小时即可完成测定。
Thallium metal impurities in the analysis, the general use of hydrochloric acid or hydrogen bromide medium with methyl isobutyl ketone or ether extraction separation of thallium, and then chemical, chemical spectroscopy or thallium nitrate powder spectroscopy. The first two processes long, high cost, the latter low sensitivity, toxicity. We tested the precipitation of thallium nitrate crystal precipitation most of the thallium, nitric acid soluble impurities were determined in the supernatant. This method low cost, high sensitivity, low toxicity, 3-4 hours to complete the determination.