Evaluation of Detection Limits with Wavelength Dispersive X-Ray Fluorescence Spectrometry

Abstract

The influence of analyte mass concentration on the determination of detection limits has been investigated by using WDXRF (Wavelength dispersive X­ ray fluorescence) spectrometry. It is aimed to obtain the analyte mass concentration that is necessary to find the best detection limit values. Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, As, Y, Zr, Nb, Mo, Ag, Cd, Sb, Nd, Gd, Er elements and binary and triple combination of these elements have been used. The samples have been selected considering the absorption edges due to the importance of the effect of matrix absorption and enhancement. The elements which have absorption edges that are close to each other have been used observe the matrix absorption and enhancement. The results of this study are given in tables and graphs. From this results corresponding to the interval of 5­25 times the best value of the detection limits of analytical concentration values are found to be the ideal values. In this study, the experimental apparatus and sample preparation procedures used are presented. It is concluded that WDXRF spectrometry is a suitable technique for the determination of detection limits.

Keywords

• analyte,detection limits,WDXRF,matrix

References

1. Assoc. Proffessor İbrahim HAN Assist. Proffessor Pınar BAYKAN Assist. Proffessor Harun GÜNEY