【摘要】 利用百里香酚酞对轻稀土的选择性,在pH 9.0～9.5的条件下,使铈与其它金属离子分离,在测定溶液中加入La3+溶液,提高反应的灵敏度,制作标准曲线时用不含稀土元素的玻璃标准样品制作的溶液作为基体溶液,消除溶液中其它离子的干扰。用N2O-C2H2火焰原子吸收法测定玻璃中微量的铈,在100mL溶液中,铈含量在0～1 mg范围内浓度与吸光度呈线性关系,符合比尔定律。本方法用于玻璃中微量铈的测定,结果满意。更多还原

【Abstract】 At first,Ce is separated from other metal ions at pH 9.0-9.5 based on the method of selectivity characteristic of Thymolphthalein on light rare earth elements,and then adding La3+ to the solution to increase sensitivity.In order to work out standard curve the standard sample of glass without rare earth elements is used as matrix to eliminate the interference by other metal ions.Ce in glass can be determined by atomic absorption using N2O-C2H2.In the range of 0～1mg/100mL of Ce there appears a linear relation with absorbance and a good agreement with Beer’s law.The method has been applied to determination of Ce in glass with satisfactory results.更多还原