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速差动力学分析法是测定性质相似多组份混合物中单一成份的较简便理想的方法,一些分析工作者曾用来测定稀土的二元、三元混合物,但测定浓度一般为10~(-4)～10~(-5)M,有的误差超过30％。这可能是由于所采用的显色剂灵敏度不够,待测稀土浓度较高,反应速度加快,检测时间短,导致误差增大。为了提高测定的灵敏度和准确度,研究测定了稀土元素与灵敏度高、选择性好的三溴偶氮胂试剂的反应动力学行为及其参数,根
Differential kinetic analysis is a simple and ideal method for the determination of a single component in a multicomponent mixture of similar properties. Some analysts used to determine the binary and ternary mixtures of rare earths. However, the analytical concentration is usually 10 ~ (- 4) ~ 10 ~ (-5) M, some of the errors more than 30%. This may be due to the sensitivity of the developer used is not enough, the higher concentration of rare earths to be tested, the reaction speed, short detection time, resulting in increased error. In order to improve the sensitivity and accuracy of determination, the reaction kinetics behavior and parameters of rare earth elements with high sensitivity and good selectivity of tribromoarsenazo reagent were studied.