X-Ray Fluorescence Analysis of Valuable Metals

Jurado-López, A.; Castro, M.D. Luque de

doi:10.2174/157341106777698215

Cited by 7 publications

(2 citation statements)

References 55 publications

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“…However, the number of current abstracts does not reflect the overall usefulness of the method. Jurado-Lopez and de Castro 28 published a review of papers (85 references) focused on precious metal analysis by XRF for jewellery, archaeology and art. In another report, EDXRF was used to analyse Ir-Pt, Rh-Pt, Rh-Pd-Pt, and Rh-Ir-Pt disk samples and Pt-Rh thermocouple wire.…”

Section: Non-ferrous Metals and Alloysmentioning

confidence: 99%

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

Charlton

Fisher

Goodall

et al. 2007

J. Anal. At. Spectrom.

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Section: Non-ferrous Metals and Alloysmentioning

confidence: 99%

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

Charlton

Fisher

Goodall

et al. 2007

J. Anal. At. Spectrom.

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“…Here we present a greatly simplified nondestructive x-ray fluorescence (XRF) readout of the composition profiles of alloy nanowires. XRF has been widely used in various fields for rapid and accurate nondestructive metal measurements without sample preparation. , The technique provides both qualitative and quantitative analyses and offers the simultaneous multielement nondestructive readout of samples over a wide concentration range to coins and jewelry …”

mentioning

confidence: 99%

Alloy Nanowires Bar Codes Based on Nondestructive X-ray Fluorescence Readout

et al. 2007

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We demonstrate here the ability to generate ternary Co-Ni-Cu alloy nanowires with distinct X-ray fluorescence (XRF) barcode patterns using a one-step template-guided electrodeposition. Such coupling of one-step templated synthesis with a nondestructive XRF readout of the composition patterns greatly simplifies practical applications of barcoded nanomaterials. The new protocol leads to alloy nanowires with broad composition range and hence to an extremely large number of distinguishable XRF signatures. The resulting fluorescence barcodes correlate well with the composition of the metal mixture plating solution, indicating a reproducible plating processes. Factors affecting the coding capacity and identification accuracy are examined, and potential tracking and authenticity applications involving embedding the nanowires within plastics or inks are demonstrated and discussed.

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Integrated sorption–energy-dispersive X-ray fluorescence detection for automatic determination of lead and cadmium in low-concentration solutions

Pérez-Serradilla

Castro

2007

Anal Bioanal Chem

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Sorbent material packed in a PTFE laboratory-made flow cell located in the specimen holder of an energy-dispersive X-ray fluorescence (EDXRF) detector has been used for in situ solid-phase extraction (SPE) preconcentration-detection of metals. The flow cell was connected to a single-channel flow-injection (FI) manifold (for full automation of the steps and proper development of the method) by two PTFE tubes of 0.5-mm inner diameter introduced into the spectrometer specimen holder by a small orifice without distortion or modification of the instrument. The optical window open in the PTFE flow cell was adjusted to the X-ray irradiation zone of the spectrometer and fixed to it. The approach was tested by using both Pb and Cd aqueous solutions and a Dowex 50 cation-exchange resin as a sorbent, and flushing the sample through the flow cell for EDXRF measurements after removal of the sample matrix. The limits of detection and the limits of quantification (LOQs) thus obtained were 0.15 and 0.5 microg for Pb and 0.3 and 0.8 microg for Cd, respectively, values that allow the approach to be used for the analysis of drinking water by injecting a 100-mL sample into the FI manifold, taking into account the EC drinking water directives. The linear dynamic ranges are between the LOQ and 600 microg for both analytes. The method was validated by the standard addition method using tap-water samples. In addition, the integrated SPE-EDXRF approach enables the study of the variables influencing the sorption step-namely the effects of the volume of sample flushed through the column, concentrations of the analytes in the sample, breakthrough volume of the resin, elution profiles, sample pH and retention and elution flow rates-in an automatic, cheap, fast and precise way.

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X-Ray Fluorescence Analysis of Valuable Metals

Cited by 7 publications

References 55 publications

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

Atomic spectrometry update. Industrial analysis: metals, chemicals and advanced materials

Alloy Nanowires Bar Codes Based on Nondestructive X-ray Fluorescence Readout

Integrated sorption–energy-dispersive X-ray fluorescence detection for automatic determination of lead and cadmium in low-concentration solutions

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