Testing the suitability of portable X-Ray Fluorescence (pXRF) analysis of dried herbarium specimens to detect Ni hyperaccumulators in South Africa

Samojedny, Thomas J.; Balkwill, K.; Rajakaruna, Nishanta; Siebert, S.J.

doi:10.1016/j.sajb.2023.05.005

Cited by 2 publications

(1 citation statement)

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“…Nickel is a potentially toxic metal commonly reported to contaminate soil and water and is also much valued in the phytotechnology market (Nkrumah et al, 2017;Nascimento et al, 2022). Therefore, using plants to clean up Ni-polluted soils (phytoremediation) or mine Ni-rich substrates and soils using Ni hyperaccumulators (agromining) has increasingly gained attention (Tognacchini et al, 2020;Samojedny Jr et al, 2023). In such scenarios, the fast analysis and in situ capability of pXRF to assess Ni concentrations in plants are fundamental to monitoring the success of these techniques in the eld.…”

Section: Introductionmentioning

confidence: 99%

The use of a portable X-ray fluorescence spectrometer for measuring nickel in plants: sample preparation and validation

Lima,

da Silva,

Echevarria

et al. 2024

Environ Monit Assess

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X-ray uorescence is a fast, costly, and eco-friendly method for elemental analyses. Portable X-ray uorescence spectrometers (pXRF) have proven instrumental in detecting metals across diverse matrices, including plants. However, sample preparation and measurement procedures need to be standardized for each instrument. This study examined sample preparation methods and predictive capabilities for nickel (Ni) concentrations in various plants using pXRF, employing empirical calibration based on ICP-OES Ni data. The evaluation involved 300 plant samples of 14 species with varying patterns of Ni accumulation. Various dwell times (30, 60, 90, 120, 300 s) and sample masses (0.5, 1.0, 1.5, 2.0 g) were tested. Calibration models were developed through empirical and correction factor approaches. Results showed that using less than 1.0 g of sample and dwell time below 60 seconds for the study conditions led to decreased Ni detection by pXRF. Ni concentrations determined by ICP-OES were highly correlated (R² = 0.94) with those measured by the pXRF instrument. Therefore, pXRF can provide reliable detection of Ni in plant samples, avoiding the digestion of samples and reducing the decision-making time in environmental management.

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Section: Introductionmentioning

confidence: 99%

The use of a portable X-ray fluorescence spectrometer for measuring nickel in plants: sample preparation and validation

Lima,

da Silva,

Echevarria

et al. 2024

Environ Monit Assess

View full text Add to dashboard Cite

show abstract

The use of a portable X-ray fluorescence spectrometer for measuring nickel in plants: sample preparation and validation

Lima,

Silva,

Echevarria

et al. 2023

Preprint

View full text Add to dashboard Cite

X-ray fluorescence is a fast, costly, and eco-friendly method for elemental analyses. Portable X-ray fluorescence spectrometers (pXRF) have proven instrumental in detecting metals across diverse matrices, including plants. However, sample preparation and measurement procedures need to be standardized for each instrument. This study examined sample preparation methods and predictive capabilities for nickel (Ni) concentrations in various plants using pXRF, employing empirical calibration based on ICP-OES Ni data. The evaluation involved 300 plant samples of 14 species with varying patterns of Ni accumulation. Various dwell times (30, 60, 90, 120, 300 s) and sample masses (0.5, 1.0, 1.5, 2.0 g) were tested. Calibration models were developed through empirical and correction factor approaches. Results showed that using less than 1.0 g of sample and dwell time below 60 seconds for the study conditions led to decreased Ni detection by pXRF. Ni concentrations determined by ICP-OES were highly correlated (R² = 0.94) with those measured by the pXRF instrument. Therefore, pXRF can provide reliable detection of Ni in plant samples, avoiding the digestion of samples and reducing the decision-making time in environmental management.

show abstract

Testing the suitability of portable X-Ray Fluorescence (pXRF) analysis of dried herbarium specimens to detect Ni hyperaccumulators in South Africa

Cited by 2 publications

References 10 publications

The use of a portable X-ray fluorescence spectrometer for measuring nickel in plants: sample preparation and validation

The use of a portable X-ray fluorescence spectrometer for measuring nickel in plants: sample preparation and validation

The use of a portable X-ray fluorescence spectrometer for measuring nickel in plants: sample preparation and validation

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