These results demonstrate the robust nature of the technique in accommodating loose powder and pressed pellet methods. Furthermore it should be noted that the reduced weight (2.8 g) standard sample was measured using the loose powder method where larger weights (5g) were previously employed. This demonstrates that varying sample thicknesses/masses can be easily corrected using the Compton ratio method. From these results it is evident that regardless of the sample preparation technique EDXRF performed equally in all cases.