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Total amoullt oj iron in iron ore was analyzed quantitatively with Xmy fluorescent spectrometer. A poor correlation oj Fc-Ka intensity agaillst t he total iroll content determined chemically has been Jound because oj the interelement 4fect. For approaching this, a Rh-target X-ray tube was usedJor the excitation oj secondary X-rays. On the basis oj the dependence ~f Rh-Ka Compton Xray intensity upon the total content oj light elements, the illtensity relatiollship between Fe-Ka fluorescent and Rh-Ka Compton X -rays, generated Jrom a sample simultaneously, was studied against the total iron content determined chemically. According to the theoretical studies and experimmtal results, a correction equation with the ratio oj Fe-Ka to Rh-Ka Comptoll X-rqys was derivedJor determining the total iron content in briquetted powder sample. In theJormula , the influence oj oxygen , which was most important among the light elements, could be eliminated. The influence oj the heavy elements was divided into two parts; the olle was the absorption eifect Jor Fe-Ka and the other was the heavy element eifect with respect to the Compton Xrays. TheJormer influence had to do with titanium and calcium, and the latter with manganese, titanium and calcium. I n the case oj Jused sample (flux: Na2B,O, ) its correction Jormula could be simpler than that oj powder sample. Only the absorption correctionJor CaO and TiO, was required. With the samples whose total iron content ranges .from 55 to lOwt %, the accuracy obtained was ±O.23wt % in the case oj briquetted powder sample and ±O.21wt% in the case oj filSed sample.

Determination of Total Iron in Iron Ore by X-ray Fluorescent Analysis