【摘要】 研究了铈与氯代成酚S的褪色反应，借此建立分光光度法测定体。试验表明：在H2SO4介质中，氯代磺酚S被Ce（Ⅳ）氧化褪色的程度与存在的铈量成良好的线性关系，体系最大吸收波长为560nm，ε=1．01×104L·（mol·cm）－1，铈量在0～6μg·mL－1范围内符合比尔定律。方法具有较好的选择性，而且操作简单、快速、准确等优点，经用于稀土氧化物标准样和试样中铈的测定，结果满意。更多还原

【Abstract】 The decoloration reaction of Ce with chlorosulphophenol S wasstudied - A spectrophotometric method for deterdrination of Cewas established. The result indicated that the rnakimum abso-rption is at 560nm and the molar absorptiivity is 1.01 ×104 L·(mol ·cm )-1 in sulfuric acid medium. Beer’s law was obeyed from 0 to 6 g·mL-1 for Ce. The method had been used forthe determination of Ce in the standard or test samples of rareearth metal oxides with high selectivity, simple operation andaccurate result.更多还原