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本报告详细地研究了雷打克松Ⅰ光度法测定铈的诸项条件及有关反应机理。在研究工作中发现有乙醇存在其灵敏度提高30%,摩尔吸光系数ε为1×10~5,而微克量锰的存在又使灵敏度倍增,ε为2×10~5,高于羧基胂偶氮及肿偶氮Ⅲ法的灵敏度。磷酸介质优于硫酸或盐酸介质。在此基础上拟订了镁合金中0.001～0.1和铈的测定方法。
This report examines the conditions for the determination of cerium by the Lekeksson I photometric method and the related reaction mechanism. In the research work, it was found that the presence of ethanol increased its sensitivity by 30% and the molar extinction coefficient ε was 1 × 10 ~ 5, while the presence of micrograms of manganese doubled the sensitivity, ε was 2 × 10 ~ 5, higher than that of carboxyarsine azo And swollen azo Ⅲ method of sensitivity. Phosphoric acid medium is better than sulfuric acid or hydrochloric acid medium. On this basis, the determination of 0.001 ~ 0.1 and cerium in magnesium alloy was developed.