论文部分内容阅读
钽、铌中微量铝的测定,曾采用将基体钽、铌用碱熔水浸分离,铝试剂光度法测定,以阴离子交换分离钽,铜试剂—三氯甲烷萃取其它杂质,而后用8—羟基喹啉萃取比色法测定。这些方法存在着或者分离手 续冗长,或者分离效果不佳,显色条件要求相当苛刻等不足之处。 本工作提出以强碱性阴离子交换树脂吸附除去钽、铌,用邻菲啰啉、硫代乙醇酸和抗坏血酸掩蔽其它干扰离子,以铬天青S(CAS)—溴
Tantalum, niobium in the determination of trace aluminum, has used the matrix of tantalum, niobium alkali-water immersion separation, aluminum reagent photometric determination of anion exchange separation of tantalum, copper reagent - chloroform extraction of other impurities, and then 8-hydroxy Quinoline extraction colorimetric determination. These methods exist either long or short separation procedures, or poor separation, color conditions require quite harsh and other shortcomings. In this work, it is proposed to remove tantalum and niobium by strongly basic anion exchange resin and to mask other interfering ions by using phenanthroline, thioglycolic acid and ascorbic acid. Chromium Azure S (CAS)