Effect of sample preparation procedure on standardless wavelength dispersive X-ray fluorescence analysis of plant samples

XRF (X-ray fluorescence analysis) has been applied as the method for analysis of plant samples, but not in its full potential. This would be highly suitable monitoring programs and screening studies. A simple sample preparation procedure makes this technique time cost-effective, although absence adequate calibration standards some analyzed matrices can a significant limiting factor. Nevertheless, obstacle overcome by development so-called “standardless method” approach. It is important to explore possibilities limitations such an materials. The accuracy dependent on physical characteristics sample, which significantly affected procedure. Variations 3 crucial parameters: mass samples (from 1 5 g), binder ratio 0 25% wax), pressing pressure 10 25 t) were tested needles obtained from two widespread conifer species: Pinus nigra Abies alba. For most elements, correlation between concentration change was statistically significant, while there no pellet pressure. both types needles, estimated systematic error always higher than random error. difference errors among with different wax content mass, variation did introduce any On average inflated value 18 13% pine fir needle (respectively), introduced lesser extent, it 11% 10% samples. pelletizing results only 3.9% needles.