有机铈(镧)金属络合物中碳、氢、铈(镧)的同时测定

有机铈(镧)金属络合物中碳、氢、铈(镧)的同时测定 SIMULTANEOUS DETERMINATION OF CARBON、 HYDROGEN AND CERIUM OR LANTHANUM IN ORGANIC COMPLEXES OF Ce OR La 卢永志 Lu Yongzhl first-author <正> 关于有机稀土金属络合物中铈或镧的测定方法文献报导不多。1973年P.Borda等[1]报告了用氧瓶燃烧法测定有机金属络合物中的钢系元素,但并未提到铈络合物的分解及氧化物在吸收液中的溶解度。作者曾试验用氧瓶燃烧法来分解有机铈络合物,发现通过氧瓶燃烧后,铈的氧化物粘结在铂丝上,难溶于吸收液而影响铈的测定。后来,我们使用湿法氧化法分解试样,然后用氧化还原滴定法测定铈的含量获得了令人满意的结果。然而操作手续仍比较麻烦费时。 Bazalitskaya和Gel’man等[2-3]对金属有机化合物中碳、氢、金属的同时测定作过不 We wish to report a method for the Simultaneous determination of C. H aud Ce or La, The Sample（10～15mg）is weighed directly in a quartz Capsule, then the capsule is placed inside a quartz combustion tuhe Which is filled with cobalto-eobaltie Oxide and the product of thermal decomposition of Silver permanganate（6cm long）. The Combustion tube filled with layers of catalysts is maintained at 600℃, the sample is pyrolysed slowly at 850°～900° in current of O （20～25mi/min）. The C and H are determined by conventional gravimetry, and the Ce or La is determined from the increase in weight of the capsule, The mean error for each element is <0.3%. 1980-04-01 2021-04-01 4