Quantification of trace arsenic in soils by field-portable X-ray fluorescence spectrometry: Considerations for sample preparation and measurement conditions

Parsons, Christopher T.; Marguí, Eva; Pili, Éric; Floor, Geerke H.; Román-Ross, Gabriela; Charlet, Laurent

doi:10.1016/j.jhazmat.2012.07.001

Cited by 148 publications

(91 citation statements)

References 21 publications

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“…PXRF can quantify elements from z = 15 (P) through 94 (Pu) and is useful for environmental monitoring of many elements in soils and other geological materials (Weindorf et al, 2013a;Wiedenbeck, 2013). Applied to soil science, many studies have focused on metal contamination assessment using PXRF (Weindorf et al, , 2013bParsons et al, 2013;Paulette et al, 2015;Hu et al, 2014), and PXRF elemental data has been used as a proxy for a wide number of soil parameters such as pH (Sharma et al, 2014a), cation exchange capacity (Sharma et al, 2014b), soil calcium and gypsum (Weindorf et al, , 2013aZhu and Weindorf, 2009), soil texture (Zhu et al, 2011), soil salinity (Swanhart et al, in press), and soil horizonation (Weindorf et al, 2012b,c).…”

Section: Introductionmentioning

confidence: 99%

Development of a hybrid proximal sensing method for rapid identification of petroleum contaminated soils

Chakraborty

Weindorf

et al. 2015

Science of The Total Environment

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Section: Introductionmentioning

confidence: 99%

Development of a hybrid proximal sensing method for rapid identification of petroleum contaminated soils

Chakraborty

Weindorf

et al. 2015

Science of The Total Environment

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“…More recent papers of relevance include: Marsala et al (2012), mineralogical and lithological characterization of drill cuttings; Kessler & Nagarajan (2012), determination of Rb in sedimentary rocks; Wu et al (2012), reliability of pXRF in the analysis of soils for various elements; Parsons et al (2013), optimization of pXRF to determine As in soils; and Rowe et al (2012), optimization of and calibration strategies for pXRF analysis of mudrock chemostratigraphy and geochemistry. The small number of publications on the use of pXRF in exploration and mining belies its current level and depth of application by this industry.…”

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confidence: 99%

Evaluation of portable X-ray fluorescence (pXRF) in exploration and mining: Phase 1, control reference materials

Hall¹,

Bonham-Carter²,

Buchar³

2014

GEEA

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This paper describes a project sponsored by the Canadian Mining Industry Research Organisation (CAMIRO) to evaluate the strengths and weaknesses of portable XRF for use in mineral exploration and mining and to develop best-practice protocols in the analysis of rocks, soils, sediments and drill-core. Phase I focussed on the analysis of pulp control reference materials (CRMs) to determine the figures of merit, principally accuracy and precision, of the technique before introducing the confounding parameters associated with in-situ analysis such as heterogeneity, particle size and moisture.Five instruments (three handheld and two portable benchtop) from three manufacturers were used to carry out replicate analyses (n = 10) of a diverse suite of 41 CRMs, from barren granites, through soils and sediments, to ores. Standard factory calibration, in mining and soil modes, was used. The performance of the instruments was evaluated using x-y plots of results versus established element concentrations for the CRMs and the values of goodness of fit (r 2 ), slope and intercept documented for both full and restricted concentration ranges.For many elements, the performance across the instruments varied markedly, as did the ability to correct for spectral interferences. Numerous interferences were encountered, particularly from the rare-earth elements (REEs) on transition elements, but also for well-known interference pairs such as Pb on As, Zn on Au, U on Mo, and Th on Bi. In general, major elements with the exception of the light element Mg were well determined, as were Mn and Ti. Sensitivity was inadequate for Cl and P; however, S could be measured with acceptable precision to c. 0.05% S. Performance for the trace elements was categorized as follows: very good for As, Cu, Nb, Pb, Rb, Sr, and Y (r 2 >0.9 for more than 1 instrument); good for Ba, Mo, Sn, Zn and Zr (r 2 >0.9 for 1 instrument); moderate for Cr, Sb, Se, Th and U (r 2 = 0.6-0.8); poor for Ag, Cd, Co, Ni and V; and very poor for Au, Bi, Cs, Hf, Hg, Pd, Sc, Ta, Te and W. Of the REEs determined (La, Ce, Nd, Sm, using the standard calibration by the manufacturer, i.e. not REE-specific), only La showed adequate sensitivity and precision (3-5% RSD), however, only at concentrations approaching c. 1000 ppm (50-100% RSD at La <100 ppm).Slopes of the best-fit lines, where r 2 ≥0.6, ranged from 0.5 to 5.0, indicating that calibration is required by the user for both the soil and mining modes. The precision, shown by 10 replicate readings, was excellent and usually better than 10% RSD except where close to detection limit or where major interferences were present.The beam time study showed that, in most situations, 60 s was a good compromise between productivity and precision but also highlighted cases of significant drift and a lack of improvement in precision with longer beam time. A study of the thin-film sample cover used for cups demonstrated that 4.0-µm Prolene® is superior to the same thickness of Mylar® in both transmittance (especially for Mg, Al, Si) and co...

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“…However, several physico-chemical parameters of soil are known to affect the quality and the precision of PXRF reading, essentially sample matrix, surface irregularity, interfering elements, mineralogy, particle size and soil moisture [9,[11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of soil moisture on trace elements concentrations using portable x-ray fluorescence spectrometer

Sahraoui

Hachicha

2017

J. Fundam and Appl Sci.

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Portable X-ray fluorescence (PXRF) technology can offer rapid and cost-effective determination of the trace elements concentrations in soils. The aim of this study was to assess the influence of soil moisture content under different condition on PXRF measurement quality. For this purpose, PXRF was used to evaluate the soil elemental concentrations for Ca, Mg, Cd, Cr, Cu, Ni, Zn, P, Fe, Mn and Pb in 60 samples in a perimeter irrigated with treated wastewater (Cebala Borj Touil, North-east Tunisia). Scanning was conducted under four moisture conditions: in-situ, dried soil at 105°C, 40% moisture content soil and saturated soil.All were then compared relatively to dried sample scans. As expected, the relationship between dried vs both in-situ and 40% moisture content elements concentrations were linear.However, PXRF readings from saturated samples were significantly underestimated compared to the measurements on dry samples. Furthermore, soil moisture content caused a significant under-reporting of elemental concentrations compared to the scanning on dry samples. PXRF acted differently for each element following the moisture content of soil. In fact, attenuation coefficient σ of Cr, Fe and Mn were the most affected by saturation of soil samples, whilst Ca, Mg and Ni were more affected for 40% moisture content while Cd, Pb, Zn, Cu and P were affected for in-situ measurements. Correction equations enhanced the error produced by the water influence moisture content and corrected PXRF measurements.

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Quantification of trace arsenic in soils by field-portable X-ray fluorescence spectrometry: Considerations for sample preparation and measurement conditions

Cited by 148 publications

References 21 publications

Development of a hybrid proximal sensing method for rapid identification of petroleum contaminated soils

Development of a hybrid proximal sensing method for rapid identification of petroleum contaminated soils

Evaluation of portable X-ray fluorescence (pXRF) in exploration and mining: Phase 1, control reference materials

Effect of soil moisture on trace elements concentrations using portable x-ray fluorescence spectrometer

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