论文部分内容阅读
提出不快速重量分析法测定钼铁和钼添加剂中的铝(以8-羟基■盐形式)。在锆坩埚中用过氧化钠与碳酸钠混合助熔剂使试样熔化以达到完全分解。用水浸取冷却的熔块,使钼以钼酸钠形式与铁(Ⅲ)和其它含水氧化物立即分离。过滤后,在加入 EDTA 和草酸后,用8-羟基喹啉沉淀钼,并用重量分析法测定。精密度与准确度和标准法差不多。
An unacceptable gravimetric method for the determination of aluminum in molybdenum iron and molybdenum additives (in the form of the 8-hydroxyl ■ salt) was proposed. In a zirconium crucible with sodium peroxide and sodium carbonate mixed flux to the sample melting to achieve complete decomposition. The cooled frit is leached with water and the molybdenum is immediately separated from the iron (III) and other hydrous oxides as sodium molybdate. After filtration, the molybdenum is precipitated with 8-hydroxyquinoline after addition of EDTA and oxalic acid, and gravimetrically determined. Precision and accuracy and standard method.