铝存在时氟电极对氟的响应

Response of F-ISE to Fluoride in the presence of Aluminum

In this paper the equilibriums between aluminum and fluoride in the solution with or without complexing agents have been systematically studied on the basis of theoretical calculations and experiments. For determination of fluoride in the presence of aluminum, the maximum permissible amount of aluminum (T_(Alm)) has been obtained. An equation of seventh degree has been derived which is to be used for calculations of both aluminum and fluoride. The responses of F-ISE to four complexing agents (Tart, Cit, Tiron, SSA) are measured. The values of T_(Almax) which can be masked by four complexing agents in common use have been determined by experiments. These results presented are of some practical value.