Abstract In the presentstudy,bauxite samples were scanned by EDX3600B X-ray fluorescence analyzer,andthe relationship between the X-ray fluorescence spectra and the concentrationof aluminium,silicon and iron in bauxite was studied.Forpredicating the aluminium,silicon and iron concentration in bauxite,3PLS model were established respectively with 3,2,2 optimal factors and closelyrelevant electron volt ranges.After cross-calibration,the correlationcoefficient of value predicted by PLS model against that measured by ICP were0.9407,0.9685,0.9990 separately.Meanwhile,the univariate linear regressionmodel was also built.Obviously,the PLS method was better than the linearregression for predication.It showed that the accuracy of prediction wasimproved evidently by PLS model.
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