High-sensitivity X-ray fluorescence analysis of solutions with the use of a sorption accumulation microsystem

Хамизов, Р. Х.; Gruzdeva, A. N.; Tokmachev, M. G.; Tsizin, G. I.; Тихонов, Н. А.; Kumakhov, M. A.

doi:10.1134/s106193480909007x

Cited by 4 publications

(5 citation statements)

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“…Limits of detection for measurements on the agar thin films were 0.26 mg mL À1 for Ca, 0.20 mg mL À1 for Cd, 0.030 mg mL À1 for Cu, 0.11 mg mL À1 for Fe, 1.4 mg mL À1 for K, 0.029 mg mL À1 for Mn, 0.016 mg mL À1 for Ni, 0.066 mg mL À1 for Pb, 0.088 mg mL À1 for V and 0.017 mg mL À1 for Zn. Khamizov et al 159 offered a mass-transfer kinetic model for an embedded sorption accumulation micro-system based on polycapillary lenses for the XRF analysis of elements in multi-component solutions. Experimental data were presented for the sorption of Cu, Fe, Mn, Ni and Zn.…”

Section: Sample Preparation and Preconcentration Techniquesmentioning

confidence: 99%

Atomic spectrometry update–X-ray fluorescence spectrometry

West

Ellis

Potts

et al. 2010

J. Anal. At. Spectrom.

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Section: Sample Preparation and Preconcentration Techniquesmentioning

confidence: 99%

Atomic spectrometry update–X-ray fluorescence spectrometry

West

Ellis

Potts

et al. 2010

J. Anal. At. Spectrom.

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“…As a consequence, elution of analyte from sorbents is not necessary, and repetitive, laborious, and time consuming sample handling can be avoided. The procedures of extraction, 14 chelation, 15 sorption, 16 and precipitation 17 are frequently combined with XRF analysis. The most commonly used reagents are diethyldithiocarbamate (DDTC, NaDDTC), ammonium pyrrolidine dithiocarbamate (APDC, PDTC), and 1-(2-pyridylazo)-2-naphthol (PAN).…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of Trace Amounts of Zinc and Copper from Water Samples onto Polystyrene Foils Prior to Determination by Wavelength-Dispersive X-ray Fluorescence Spectrometry

Zawisza

Sitko

2012

Appl Spectrosc

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A simple method of determining trace amounts of zinc (Zn) and copper (Cu) by wavelength-dispersive X-ray fluorescence spectrometry (WDXRF) is proposed. The method is based on the preparation of special foils enriched with specified trace elements. In the first step, the elements were preconcentrated by liquid-liquid extraction using dithizone in CCl4. In the second step, the obtained extracts containing determined elements were mixed with a solution of polystyrene in CH2Cl2. After the evaporation of the organic solvents the produced foils were peeled off the Petri dish and analyzed by WDXRF. The method of preconcentration of trace amounts of Zn and Cu as well as the procedure of obtaining suitable foils for XRF measurements were optimized. We studied the effects of parameters such as the amounts of complexing agent and selected interfering elements, pH, and volume of analyte solutions on the recovery of Zn and Cu in the extraction process and their determination. The homogeneity of the mass per unit area of the prepared foils was evaluated using the internal standard method. The proposed method allows determination of trace amounts of Zn and Cu with about 98% recovery and 7 ng mL−1 detection limits for 250 mL of water. The method is useful for routine determination of trace metals in aqueous samples by X-ray fluorescence spectrometry.

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“…Combined schemes of analysis of solutions, including adsorption preconcentration of trace ele ments and their determination in the adsorbent phase or in a liquid concentrate obtained by subsequent des orption are widely used in present day analytical chemistry to reduce the limits of detection for trace elements [1][2][3]. Such analytical schemes involve vari ous instrumental methods, in particular, energy dis persive X ray fluorescence analysis (EDXRF), suitable for the analysis of solids.…”

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confidence: 99%

“…Previously the researchers of the Institute of Phys ical Optics and the Vernadsky Institute of Geochemis try and Analytical Chemistry of the Russian Academy of Sciences have developed highly sensitive experi mental instruments for EDXRF with replaceable reus able concentration cartridges designed a layer of micrograins of one or another adsorbent irradiated by primary X ray beam [3][4][5][6][7]. The substrates for micro grains were polycapillary structures consisting of hun dred thousands of identical microchannels.…”

mentioning

confidence: 99%

“…The substrates for micro grains were polycapillary structures consisting of hun dred thousands of identical microchannels. A new ver sion of sorption-X ray fluorescence method was pro posed for determining metals in solutions based on the use of the laws adsorption kinetics and requiring no quantitative extraction of the analytes from the test solution [3,8]. On an example of determining 0.3-2.0 mg/L Mn, Fe, Ni, Cu, and Zn in tap water the analytical characteristics of the proposed approach were demonstrated along with the possibilities of reducing the limits of detection for metals by two orders of magnitude.…”

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confidence: 99%

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Possibilities of micro X-ray fluorescence spectrometry of solutions with preconcentration

Bolotokov¹,

Gruzdeva

Хамизов

et al. 2014

J Anal Chem

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Results of investigations in energy dispersive X ray fluorescence analysis aimed at the develop ment of a high sensitivity method of microanalysis of solutions are presented. A combined scheme of analysis of one drop of solution of the volume several microliters is proposed and tested. The scheme includes a new preconcentration method based on the drop evaporation in the presence of a micrograin of a hydrophilic adsorbent followed by the microanalysis of the solid phase on the portable device with a polycapillary lens with a focal spot of 10 µm designed at the Institute of Physical Optics. Analytically meaningful X ray fluores cence spectra are obtained using DETATA (grain diameter about 100 µm) and SAC8 (50 µm) adsorbents and individual drops of model solutions containing Mn, Fe, Co, Ni, Cu, and Zn (0.2 mg/L and higher) and ana lytical characteristics of the proposed approach are demonstrated.

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High-sensitivity X-ray fluorescence analysis of solutions with the use of a sorption accumulation microsystem

Cited by 4 publications

References 1 publication

Atomic spectrometry update–X-ray fluorescence spectrometry

Atomic spectrometry update–X-ray fluorescence spectrometry

Preconcentration of Trace Amounts of Zinc and Copper from Water Samples onto Polystyrene Foils Prior to Determination by Wavelength-Dispersive X-ray Fluorescence Spectrometry

Possibilities of micro X-ray fluorescence spectrometry of solutions with preconcentration

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