When modified Kalmanfiltering is applied to analyze Mg-Ca-Ba three components system, recoveries of results 95% -116% are gained where mole ratio of metallic ions is between 1 : 1 - 1 : 20. When it is applied to analyze Zn-Cu-Ni-Cd-Co-Fe six components system, recoveries of results 79% -135% are gained where mole ratio of metallic ions is between 1 > 1-1 : 45. It is succesful to analyze the actual samples of Huangpu River by using the method.