QUANTITATIVE ANALYSIS METHOD OF SELENIUM BY FLAME ATOMIC ABSORPTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a quantitative analysis method of selenium capable of suppressing interference by a coexistent element by adding a third material (phosphoric acid or a phosphate) having an effect for suppressing a composite oxide production of selenium in a flame.;SOLUTION: In this quantitative analysis method of selenium using a flame atomic absorption method, in order to remove an influence of a coexistent element, measurement is performed after adding phosphoric acid or a phosphate to a measuring liquid. The coexistent element includes at least one of Al, Ca, Cd, Co, Cr, Fe, Mg, Mn, Mo, Ni, Si, V and Zn. The phosphate ion concentration based on the phosphoric acid or the phosphate added into the measuring liquid is preferably in the range of 100-20,000 mg/l.;COPYRIGHT: (C)2007,JPO&INPIT