Possibilities of ED-XRF with radionuclide sources for analysis of plants

Abstract

A comparative evaluation of the applicability of different radionuclide sources for the determination of toxic elements in plants by ED-XRF is presented. 23Spu or l~ are suggested as most suitable single excitation sources in ED-XRF for monitoring investigations. More elements are determined with a combination of 55Fe/l~The results obtained by radionuclide ED-XRF analysis of different plants show that the method permits the reliable determination of Br, Ca, Fe, K, Mn, Rb, Sr and Zn in plant bioindicators. For toxic elements like As, Cd, Cu, Cr, Hg, Ni, Se and Pb the detection limits of the method are not low enough.

Elementary chemical analysis in leaves infected by fumagina by X-Ray fluorescence technique

“…Comparing the results of Table 6 with those of this work for healthy leaves (Tables 2 to 5), it could be observed that the range of concentration of Fe in both works had the same order of magnitude. Ivanova et al (1999), didn't present any results for Ti. The values obtained for the range of concentration of Mn were equivalent in both the works.…”

“…The concentration of Fe measured in the infected leaves of olive trees with fumagina was 80ppm, quite inferior to the observed values in the infected leaves studied in this work. Ivanova, et al(1999), using the EDXRF technique with radionuclide sources, analyzed the species of healthy plants Pleurozium schreber, Taraxacum officinale, Picea abies and Populus nigra "Italica". Table 6 shows the results of the concentrations obtained for K, Ca, Mn, Fe, Cu and Zn.…”

“…This was the only work in which the variation in the concentration of Fe was measured in the plants infected by fumagina. Ivanova et al, (1999), using the EDXRF technique with radionuclide sources, measured elements concentrations in four species of the healthy plant leaves. Guohui and Shouzhong (1995) reported the direct determination of 25 elements (11 ≤ Z ≤ 82) in dry powdered plant materials by X-ray fluorescence spectrometry.…”

Variations in essential and non-essential element composition and yield of silage corn fertilized with sulfur

“…X-ray flourescence spectroscopy is one of the primary application in X-ray science and it has been used as analytical tool for plant analysis (Ivanova et al 1999;Anjos et al 2002;Hodson and Sangster 2002;Chuparina and Gunicheva 2003). PEDXRF is used normally to determine the concentrations of different elements in a sample with advantages of good sensitivity, non-destructiveness and simple relation to fundamental physics of atom-radiation interaction (Anjos et al 2002).…”

“…The third target is a pure metal target suitable for specific elements or small groups of adjacent elements. Additionally this target is useful for generating Compton scatter peaks which can be used for matrix correction (Ivanova et al 1999;Chuparina and Gunicheva 2003). Representative PEDXRF spectrum of some selected elements of silage corn grown under control conditions in the first year of the experiment was presented in Figure 2.…”