FLUORINE DETERMINATION IN SILICATE ROCKS USING A SPECIFIC ION ELECTRODE

Abstract

Fluorine determination in silicate rocks has been done without separation of aluminum using a specific ion electrode. Analyses were made using sodium carbonate fusion with zinc oxide and 0.2M sodium citrate-0.2M potassium nitrate solution as a buffer.
The results of investigation on the aluminum interference show that the influence is very small, and those of determination of standard rocks show good agreement with the reported values. This method is very useful for determination of fluorine in silicate rocks.