By monitoring fluorine compound of national standard sample with ion selective electrode method and ion chromatoghrphy,the results show that there distinctive differences of the same sample.

• 用离子选择电极法、离子色谱法两种方法对氟化物国家标准样品进行测量,通过比较发现两种方法测量国家标样低浓度样品时有显著差异。