Rapid quantitative analysis of palladium in ores using laser-induced breakdown spectroscopy assisted with laser-induced fluorescence (LIBS-LIF)

Elhamdaoui, Ismail; Mohamed, Nessrine; Selmani, Samira; Bouchard, Paul; Sabsabi, Mohamad; Constantin, Marc; Vidal, François

doi:10.1039/d2ja00120a

Cited by 10 publications

(18 citation statements)

References 23 publications

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“…Since the detailed experimental setup has been presented in one of our recent papers, 12 we will only briefly present it here. Figure 1 shows the experimental setup used for our LIBS-LIF and conventional LIBS experiments.…”

Section: Methodsmentioning

confidence: 99%

“…The focal spot diameter of the laser was 750 µm and the distance between the centers of the laser shots was 1 mm. A first laser shot was used to decontaminate the surface, then the second shot was used to estimate the concentration of Pt and Pd at the same location using the calibration curves shown in Figure 4d for Pt and in Elhamdaoui et al 12 for Pd. The LIBS spectra were also recorded at each position to normalize the Pt peak with respect to I1, the area of the Fe 270.86 nm line.…”

Section: Validation Of the Libs-lif Methods For The Measurement Of Pt...mentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11] Laser-induced breakdown spectroscopy assisted by laser-induced fluorescence (LIBS-LIF) is an emerging tool for the exploration and production phases of the mining industry, as it can provide rapid quantitative analysis of precious metals potentially at sub-parts per million (sub-ppm) concentrations in solid ores. 12 The use of LIBS-LIF can be particularly beneficial during the geochemical prospecting phase, as conventional methods used at mine sites require samples to be sent to a laboratory for analysis, which can mean delays of at least two to three days. This lengthy process delays mining operations and increases exploration and production costs.…”

Section: Introductionmentioning

confidence: 99%

“…Their work shows that LIBS-LIF holds great promise for uranium resource characterization. The LIBS-LIF technique was also successfully used by Elhamdaoui et al 12 to measure trace amounts of palladium (Pd) in solid ore samples with a LOD of 16 parts per billion (ppb) calculated over an average of 100 spectra, i.e., about 160 ppb for a single spectrum. However, in order to fit the full range of the Pd signal extracted from the ore into the dynamic range of the camera coupled to the spectrometer, the single-spectrum LOD had to be increased to 1 ppm, which is the value used in this study.…”

Section: Introductionmentioning

confidence: 99%

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Quantifying Platinum and Palladium in Solid Ore Using Laser-Induced Breakdown Spectroscopy Assisted by the Laser-Induced Fluorescence (LIBS-LIF) Technique

Elhamdaoui,

Selmani,

Sabsabi

et al. 2023

Appl Spectrosc

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The laser-induced breakdown spectroscopy assisted by laser-induced fluorescence (LIBS-LIF) in a two-step process was used to measure the concentration of platinum (Pt) and palladium (Pd) by surface analysis of a solid ore core from the Lac des Iles mine followed by analysis of the same core that was pulverized and compacted. This work focuses mainly on the measurement of Pt since the case of Pd has been extensively discussed in previous work. The excitation of Pt is performed at 235.71 nm with fluorescence emission observed near 269.84 nm. Calibration was performed with synthetic samples prepared from the same ore as the samples studied and the calibration curve shows good linearity in Pt content over several orders of magnitude. A limit of detection (LOD) of approximately 0.15 parts per million (ppm) over an average of 200 laser shots was demonstrated. In contrast, conventional LIBS provides a LOD of about 21 ppm over an average of 200 laser shots due to low signal-to-noise ratio and spectral interference from other elements and does not meet the requirements for estimating the average Pt concentration in the ore. The Pt concentrations obtained by LIBS-LIF on solid ore are generally in good agreement with those obtained in its pulverized and compacted form, as well as with laboratory measurements made by conventional chemical methods. However, the comparison of the results obtained for Pd by LIBS-LIF with the laboratory showed a less satisfactory agreement, probably due to its more inhomogeneous distribution in the ore.

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Section: Methodsmentioning

confidence: 99%

Section: Validation Of the Libs-lif Methods For The Measurement Of Pt...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantifying Platinum and Palladium in Solid Ore Using Laser-Induced Breakdown Spectroscopy Assisted by the Laser-Induced Fluorescence (LIBS-LIF) Technique

Elhamdaoui,

Selmani,

Sabsabi

et al. 2023

Appl Spectrosc

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“…LIBS-LIF has several improved features over LIBS alone, including a reduced SNR/SBR, reduced matrix effect impact, reduced spectral interference, and lower detection limit. [23][24][25] As a result, this technique has been utilized for various applications, including isotopic analysis, 26 standoff detection, 27 and detection of heavy metals in soil 28 and water, among others. The reported limit of detection (LOD) for lead in the direct analysis of owing laminar water samples is 39 partsper-billion.…”

Section: Introductionmentioning

confidence: 99%

Detection of lead in water at ppt levels using resin-enrichment combined with LIBS-LIF

Wen

Nie

et al. 2023

J. Anal. At. Spectrom.

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Laser-produced craters in minerals of a palladium ore sample

Selmani,

Elhamdaoui,

Mohamed

et al. 2023

Appl. Phys. A

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Laser-induced breakdown spectroscopy (LIBS) is an emerging technique in geochemistry that allows rapid in-situ analysis of the elemental composition and concentration of minerals by laser ablation of the material surface and measurement of the light emitted by the resulting plasma. However, this type of application is still under development for geochemical analyses. Indeed, it is still difficult to know how minerals are ablated under laser pulses in the context of LIBS geochemical analysis using a high-power Q-switched Nd:YAG laser operating at 1064 nm with pulse durations on the order of nanoseconds. Important questions remain unanswered regarding the volume sampled by the laser beam on the minerals to be analyzed, as well as the plasmas induced by the laser on the minerals in air at atmospheric pressure. The objective of this work is to provide insight into laser-mineral interactions within the framework of LIBS geochemical analysis of ore samples with emphasis on the characterization of plasmas and laser ablation craters under ambient air at atmospheric pressure. We study the crater morphology in the three main phases of a palladium ore fragment (Lac des Iles mine, Canada), namely plagioclase feldspar, amphibole and sulfides [Mohamed et al., Geostand Geoanal Res 45:539, (2021)] We performed four series of laser shots (50, 250, 500 and 1000 shots) in the three mineral phases and characterized the morphology of the craters obtained by scanning electron microscopy and optical coherence tomography. It turns out that laser ablation is most effective in plagioclase, presumably due to its lower thermal conductivity. In addition, the temperature and electron density of the plasma were determined for each phase from the iron and nickel lines of LIBS spectra taken 4 µs after the laser shots. They are between 6300 and 8600 °C and about 2 × 1017 cm−3, respectively.

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Rapid quantitative analysis of palladium in ores using laser-induced breakdown spectroscopy assisted with laser-induced fluorescence (LIBS-LIF)

Abstract: This paper discusses the use of conventional LIBS and LIBS-LIF techniques for measuring trace amounts of palladium in solid ore samples. Combination of excitation/fluorescence of Pd lines as well as...

Cited by 10 publications

References 23 publications

Quantifying Platinum and Palladium in Solid Ore Using Laser-Induced Breakdown Spectroscopy Assisted by the Laser-Induced Fluorescence (LIBS-LIF) Technique

Quantifying Platinum and Palladium in Solid Ore Using Laser-Induced Breakdown Spectroscopy Assisted by the Laser-Induced Fluorescence (LIBS-LIF) Technique

Detection of lead in water at ppt levels using resin-enrichment combined with LIBS-LIF

Laser-produced craters in minerals of a palladium ore sample

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