中文摘要：

采用马弗炉将样品与NaOH混合进行熔融煅烧，热去离子水提取、离心、稀释后过OnGuard Ⅱ H柱和过滤膜进行前处理，抑制型电导离子色谱法检测，测定了Ta2O5和Nb2O5的氟离子、氯离子和硫酸根离子。该方法对三种被测阴离子的检测限（s／N=3）在0．15～0．70μg／g（以固体样品实际浓度计）或0．136～0．623μg／L（以溶液浓度计），标准曲线线性范围均在两个数量级以上，方法的精密度（RSD，n=7）小于5．46％，回收率为88％～106％，具有灵敏度高、选择性好、重现性佳、对环境友好等特点，用于实际样品的检测，结果令人满意。

英文摘要：

The present paper introduces a method in which tantalum pentoxide and columbium pentoxide samples pretreated by calcining with NaOH in Muffle, extracting and diluting by DI water, passing sample solution through OnGuard Ⅱ H cartridges and 0.22 μm micropore nylon filtration membranes followed by separating analytes with ion chromatography and detecting trace anions by suppressed conductivity detector. The detection limits （s/N = 3） of the method for fluoride, chloride and sulfate are from 0.15 μg/g to 0.70 μg/g （calculated by the concentrations in solid samples） or from 0.136 μg/L to 0.623 μg/L （calculated by the concentration in solutions）. All three calibration curves are linear over two orders of magnitude. The recoveries for three analytes are between 88%～106% with precision of less than 5.46% RSD （n = 7）. This method possesses of the advantages of high sensitivity, distinguished selectivity, good reproductivity and being-friendly to the environment.