Determination of Trace Elements inAlternanthera brasilianaandPfaffia glabrataby SRTXRF: Application in Environmental Pollution Control

Abstract

Aiming at environmental control, we report the use of synchrotron radiation total reflection x-ray fluorescence (SRTXRF) analysis as a technique for trace elements determination in plants. The analyses were performed in two species (total plant) of Amaranthaceae family: Alternanthera brasiliana from four sites and Pfaffia glabrata from a single site. Some elements, such as P, S, K, Ca, Mn, Fe, Cu, Zn, Sr, and Pb were detected in all samples, and the elements Cl, Ti, Cr, Co, Ni, Br, Rb, Sr, Cd, Sn, Sb, and Ba were detected in some samples. The limit of detection (LOD) varied from 0.315 (Cu) to 121.4 (P) mg g 21 .

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“…The values obtained for other elements are given in (Table 2). Salvador et al [32] performed the elemental analysis of A. brasiliana (total plant) and reported the presence of P, K, Ca, Zn and Cu and this result is in agreement with the present findings [32]. Magnesium plays crucial role in lipid membrane stabilization, replication and metabolic processes [33].…”

Kinetics of Lead Bioaccumulation from a Hydroponic Medium by Aquatic Macrophytes Pistia stratiotes

“…A dry-biomass digestion was carried out by the addition of 5.0 ml (65%) HNO 3 and 0.5 ml (30%) H 2 O 2 to 0.5 g of leaves or roots in digestion glassware and by heating on a hot plate (Pettersson and Olsson 1998;Salvador et al 2004). Finally, deionized water was added into the digested sample to reach a total volume of 10 ml and then the solution was stored (Salvador et al 2004;Espinoza-Quiñones et al 2005).…”

Chromium ions phytoaccumulation by three floating aquatic macrophytes from a nutrient medium

“…The nutrient medium samples were collected in acid-rinsed polyethylene bottles, where 3 ml (65%) HNO 3 per 1 l of water and then stored in a refrigerator at 15°C for later processing and metal analysis. A dry-biomass digestion was carried out by the addition of 5.0 ml (65%) HNO 3 and 0.5 ml (30%) H 2 O 2 onto 0.5 g of leaves or roots in digestion glassware and by heating on a hot plate (Pettersson and Olsson 1998;Salvador et al 2004). Finally, de-ionized water was added up into digested sample to reach a total volume of 10 ml and it was stored (Salvador et al 2004;Espinoza-Quiñones et al 2005).…”

“…Using the relative-to-gallium sensitivity function, the chromium concentration in aqueous solutions (nutritive solution or digested biomass (roots or leaves)) were calculated by using Eq. 3 (Simabuco and Matsumoto 2000;Salvador et al 2004;Espinoza-Quiñones et al 2005). Nevertheless, the chromium mass per dried biomass (roots or leaves) was determined from the chromium concentration on dry-biomass digestion solution, according to the Eq.…”