Simultaneous determination of hydride forming elements (As, Bi, Ge, Sb, Se) and Hg in biological and environmental reference materials by electrothermal vaporization–microwave induced plasma-optical emission spectrometry with their in situ trapping in a graphite furnace

Matusiewicz, Henryk; Kopras, Mariusz

doi:10.1039/b309359j

Cited by 39 publications

(16 citation statements)

References 25 publications

(43 reference statements)

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“…Various different techniques such as neutron activation analysis (NAA; Abugassa et al 1999;Faghihian and Rahbarnia 2002;Lin and Henkelmann 2003;Menezes et al 2004), atomic absorption spectrometry (AAS; Sturaro et al 1993), and atomic emission spectrometry (AES; Asfaw and Wibetoe 2004;Matusiewicz and Kopras 2003) have been employed in the detection of trace metals presented in human hair. X-ray fluorescence (XRF) spectrometry is also applied to hair analysis (Dede et al 2001;Kolmogorov et al 2000), although the determination of some trace elements, such Pb, Ni, Mn, and Cr, produces particular difficulties.…”

Section: Introductionmentioning

confidence: 99%

Determination of nickel, copper, zinc and lead in human scalp hair in Syrian occupationally exposed workers by total reflection X-ray fluorescence

Khuder

Bakir

Hasan

et al. 2007

Environ Monit Assess

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The concentrations of Ni, Cu, Zn, and Pb in human scalp hair of 281 individuals working in 10 Syrian industrial plants were determined using co-precipitation by ammoniumpyrolidinedithiocarbamate (APDC) method for total reflection X-ray fluorescence (TXRF) analysis. The results were compared to data obtained for a control group consisted of individuals working at the Syrian Atomic Energy Commission and also to data reported in the literature. The results given by the group of workers in battery plant showed that Pb concentration in human scalp hair samples were higher than those for control group, while some abnormal concentrations were obtained for Cu, Zn and Ni in cables, printing and battery plants, respectively. Normal concentrations of these elements were obtained for hair workers in olive oil, power stations, textile, and iron industrial plants. The relationships of Pb-Pb/Ni and Cu-Cu/Ni were plotted with correlation coefficients of 0.9937 and 0.9014, respectively. In general, the results showed that, the workers who were occupationally exposed to battery industrial pollution are at risk, followed by individuals in printing and cables industries, while the rest of workers in other industries are considered occupationally unexposed.

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Section: Introductionmentioning

confidence: 99%

Determination of nickel, copper, zinc and lead in human scalp hair in Syrian occupationally exposed workers by total reflection X-ray fluorescence

Khuder

Bakir

Hasan

et al. 2007

Environ Monit Assess

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“…Arsine trapping onto graphite substrates coated with non-nanostructured Pd yielded a trapping efficiency of 55% at 300 °C. 52 Negligible trapping efficiency was reported when trapping experiments were performed at room temperature with non-nanostructured Pd, thereby demonstrating the enhanced performance of our Pd nanocatalyst. The trapping curve showing the maximum trapping capacity of the coating can be observed in the ESI (Fig.…”

Section: Resultsmentioning

confidence: 75%

Facile preparation of an immobilized surfactant-free palladium nanocatalyst for metal hydride trapping: a novel sensing platform for TXRF analysis

Romero

Costas-Mora

Lavilla³

et al. 2015

Nanoscale

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In this work, a simple route for the synthesis of surfactant-free immobilized palladium nanoparticles (Pd NPs) and their use as effective nanocatalysts for metal hydride decomposition is described. A mixture of ethanol : water was used as the reducing agent. Ethanol was added in a large excess to reduce the ionic Pd and stabilize the obtained Pd NPs. Ethanol is adsorbed on the surface of Pd allowing steric stabilization. Freshly prepared Pd NPs were immobilized onto quartz substrates modified with 3-mercaptopropyltrimethoxysilane. Pd interacts with the thiol group of the alkoxysilane that is adsorbed on the surface of NPs without the dissociation of the S-H bond. Different parameters affecting the synthesis of Pd NPs and their immobilization onto quartz substrates were evaluated. A comprehensive characterization of the synthesized Pd NPs was carried out by transmission electron microscopy (TEM), whereas total reflection X-ray fluorescence (TXRF) spectrometry was applied in order to evaluate their catalytic activity for solid-gas reactions. Immobilized Pd NPs were applied as nanocatalysts for the dissociative chemisorption of arsine at room temperature, yielding the formation of As-Pd bonds. Quartz substrates coated with nanosized Pd could be used as novel sensing platforms for total reflection X-ray fluorescence analysis. Arsenic can be detected in situ in natural water with a limit of detection of 0.08 μg L(-1).

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“…An arsenic(V) standard solution was prepared as follows. Precisely 0.458 g of disodium hydrogen arsenate heptahydrate (Na 2 HAsO 4 ·7H 2 O, >99%, Wako Pure Chemical Industries, Ltd) was dissolved in water to make a 100 g solution, and the resulting solution was established as a 1000 mg kg Organic arsenic standards were prepared by dissolving precisely weighed quantities of methylarsonic acid (MMAA, (CH 3 )AsO(OH) 2 …”

Section: Reagentsmentioning

confidence: 99%

Decomposition of organoarsenic compounds for total arsenic determination in marine organisms by the hydride generation technique

Narukawa

Kuroiwa

Inagaki

et al. 2005

Appl. Organometal. Chem.

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The conditions necessary for the complete decomposition of six organic arsenic compounds, namely methylarsonic acid (MMAA), dimethylarsinic acid (DMAA), trimethylarsine oxide, tetramethylarsonium iodide, arsenocholine bromide (AsC) and arsenobetaine (AB), were investigated. The degree of decomposition of the arsenic compounds was monitored using a hydride generation (HYD) technique, because the response from this system depends strongly on the chemical species of arsenic, with inorganic arsenic (the expected product from these decomposition experiments) giving a much more intense HYD signal than the organic arsenic compounds. The arsenic compounds were decomposed by heating them with three types of acid mixture, namely HNO 3 -HClO 4 , HNO 3 -HClO 4 -HF, or HNO 3 -HClO 4 -H 2 SO 4 . Both MMAA and DMAA were decomposed completely using any of the mixed acids at a decomposition temperature of 200 • C or higher. The HNO 3 -HClO 4 -H 2 SO 4 mixture was the most effective for decomposing AsC and AB, which are the most difficult compounds among all types of organic arsenic compound to decompose and render inorganic. The complete decomposition of AB was only achieved, however, when the temperature was 320 • C or higher, and the sample was evaporated to dryness. When the residue from this treatment was examined by high-performance liquid chromatography combined with inductively coupled plasma atomic emission spectrometry, all of the arsenic was found to be present as arsenic(V). The optimized conditions (HNO 3 -HClO 4 -H 2 SO 4 at 320 • C) for decomposing AB were then used to determine the total amount of arsenic in marine organisms known to contain AB.

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Simultaneous determination of hydride forming elements (As, Bi, Ge, Sb, Se) and Hg in biological and environmental reference materials by electrothermal vaporization–microwave induced plasma-optical emission spectrometry with their in situ trapping in a graphite furnace

Cited by 39 publications

References 25 publications

Determination of nickel, copper, zinc and lead in human scalp hair in Syrian occupationally exposed workers by total reflection X-ray fluorescence

Determination of nickel, copper, zinc and lead in human scalp hair in Syrian occupationally exposed workers by total reflection X-ray fluorescence

Facile preparation of an immobilized surfactant-free palladium nanocatalyst for metal hydride trapping: a novel sensing platform for TXRF analysis

Decomposition of organoarsenic compounds for total arsenic determination in marine organisms by the hydride generation technique

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