LabVIEW control software for scanning micro-beam X-ray fluorescence spectrometer

Wróbel, Paweł; Czyzycki, Mateusz; Furman, Leszek; Kolasiński, K.; Lankosz, M.; Mreńca, A.; Samek, Lucyna; Węgrzynek, D.

doi:10.1016/j.talanta.2012.02.010

Cited by 34 publications

(21 citation statements)

References 14 publications

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“…Two-dimensional distribution maps of chromium or potassium (as a vascular bundle indicator) (Thompson and Zwieniecki 2005) were performed with a laboratory setup consisting of low-power X-ray tube (XOS, East Greenbush, USA) with molybdenum anode and SDD detector (Ketek, Munich, Germany) (Wróbel et al 2012). The angle between the impinging beam and the sample normal was 45° and the angle between detector axis and the sample normal was 45°.…”

Section: Methodsmentioning

confidence: 99%

Chromium distribution in shoots of macrophyte Callitriche cophocarpa Sendtn.

Augustynowicz

Wróbel

Płachno

et al. 2014

Planta

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The aim of the study was the analysis of Cr distribution in shoots of the macrophyte Callitriche cophocarpa by means of two X-ray-based techniques: micro X-ray fluorescence (μXRF) and electron probe X-ray microanalysis (EPXMA). Plants were treated with 100 μM (5.2 mg l−1) chromium solutions for 7 days. Cr was introduced independently at two speciations as Cr(III) and Cr(VI), known for their diverse physicochemical properties and different influence on living organisms. A comparative analysis of Cr(III)-treated plants by EPXMA and μXRF demonstrated high deposition of Cr in epidermal glands/hairs localized on leaves and stems of the plant shoots. Cr in Cr(III)-treated plants was recorded solely in glands/hairs, and the element was not present in any other structures. On the other hand, Cr in Cr(VI)-treated group of plants was rather found in vascular bundles. Moreover, the concentration of Cr in Cr(VI)-treated plants was significantly lower than in plants incubated in Cr(III) solution. The results obtained in this work suggest differences in chromium uptake, transport and accumulation dependent on the oxidative state of the element.

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Section: Methodsmentioning

confidence: 99%

Chromium distribution in shoots of macrophyte Callitriche cophocarpa Sendtn.

Augustynowicz

Wróbel

Płachno

et al. 2014

Planta

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“…The abundance of chromium and calcium was studied using a laboratory lXRF setup consisting of a low-power X-ray tube with a molybdenum anode and silicon drift detector (SDD detector) described in detail elsewhere (Wróbel et al 2012). The image of the experimental setup is presented in Fig.…”

Section: Atomic Force Microscopy (Afm)mentioning

confidence: 99%

Mechanical properties of Callitriche cophocarpa leaves under Cr(VI)/Cr(III) influence

2014

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Submersed Callitriche cophocarpa is an outstanding Cr phytoremediator in water systems. The mineral elements in waters can penetrate the submersed plant surface. This has led us to the hypothesis that the absorbed Cr can alter the mechanical properties of leaves. These properties were measured by applying atomic force microscopy. C. cophocarpa shoots were immersed in 100 lM (5.2 mg/l) Cr solution for 7 days. Cr was applied independently at two distinct oxidation states as Cr(VI) and Cr(III), known from different physicochemical properties and toxic effects. The contents of elements which were proportional to the fluorescence signal in individual leaves were evaluated using micro-X-ray fluorescence spectroscopy. The results obtained showed that the leaf epidermis significantly changes its elastic properties upon incubation with Cr-supplemented solution. When compared to the control, a drop in the leaf's stiffness observed for Cr(III) was ca. 42 %. In the case of Cr(VI)-treated leaves, the stiffness raised to ca. 17 %. The changes in elasticity were significantly correlated with the contents of Ca (Pearson's coefficient r = 0.87, p \ 0.017). The results led us to ascertain that it is Cr(III) but not Cr(VI) that significantly influences Ca removal from leaves thus decreasing the stiffness of the leaf's epidermis.

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“…The detailed description of the setup can be found elsewhere. 18 All measurements described in the present work were performed with an X-ray tube voltage and current equal to 50 kV and 1 mA, respectively. To calculate the transmission function of the polycapillary lens, two types of thin film standards were measured: multielement NIST SRM 1832 and NIST SRM 1833 as well as two monoelement standards of Se and Sr (Micromatter, Canada).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Depth Profiling of Element Concentrations in Stratified Materials by Confocal Microbeam X-ray Fluorescence Spectrometry with Polychromatic Excitation

et al. 2014

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The confocal microbeam X-ray fluorescence technique is a well-established analytical tool that is widely used for qualitative and quantitative analysis of stratified materials. There are several different reconstruction methods dedicated to this type of samples. However, these methods are applicable with monochromatic excitation only. The full description of matrix effects and geometrical effects for polychromatic X-ray photons in confocal geometry is a demanding task. In the present paper, this problem was overcome by the use of effective energy approximation. The reduction of the whole energy dimension into one effective value eliminates the necessity of integration over the primary beam energy range for a number of basic parameters. This simplification is attainable without loss of the accuracy of analysis. The proposed approach was validated by applying it to the reconstruction of element concentration depth profiles of stratified standard samples measured with tabletop confocal microbeam X-ray fluorescence setup and by comparing the obtained results of two independent algorithms.

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LabVIEW control software for scanning micro-beam X-ray fluorescence spectrometer

Cited by 34 publications

References 14 publications

Chromium distribution in shoots of macrophyte Callitriche cophocarpa Sendtn.

Chromium distribution in shoots of macrophyte Callitriche cophocarpa Sendtn.

Mechanical properties of Callitriche cophocarpa leaves under Cr(VI)/Cr(III) influence

Depth Profiling of Element Concentrations in Stratified Materials by Confocal Microbeam X-ray Fluorescence Spectrometry with Polychromatic Excitation

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