采用卡尔曼滤波法、导数卡尔曼滤波法对一含有 3种稀土元素与间乙酰偶氮氯膦显色的混合体系光谱进行剖析 ,并对此 2种滤波法的解析结果作比较 ,结果表明 ,在本体系中 ,导数卡尔曼滤波法的定性、定量效果明显优于卡尔曼滤波法 By using Kalman filter method and derivative Kalman filter method, the spectrum of a mixed system containing three kinds of rare earth elements and chloroacetone chlorophosphonazo was analyzed. The analytical results of the two kinds of filtering methods were compared. In this system, the qualitative and quantitative results of derivative Kalman filter are better than those of Kalman filter