【摘要】 <正> Alersandrur等研究了动力学测定钍（Ⅳ）,灵敏度仅为10^-7g数量级。作者发现盐酸介质中,钍（Ⅳ）能灵敏地催化过氧化氢氧化邻苯三酚红褪色的新指示反应,研究了此反应的动力学条件,建立了一种高选择性、高灵敏度的新方法,且具有操作简便快速,分析结果准确,重现性好的特点,便于推广使用。更多还原

【Abstract】 A new spectrophotometric method for determination of trace thotrum（Ⅳ） in water wasdeveloped, by utilizing decolorization reation of H₂O₂-Th⁴⁺-pyrogallol system which was cataliz-ed by thorium （Ⅲ）. The sensitivity, recoveries and limits of determination were 6.5×10^-12gTh⁴⁺/ml, 99～101% and 0～0.10μgTh⁴⁺/25ml respectively with variable coefficient of 2.1～4.2%.更多还原