Quantitative analysis of plant leaf elements using the LA-ICP-MS technique.
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Data
2019
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Resumo
The use of Laser Ablation coupled to Mass Spectrometry is a promising technique for analysis of plant
tissue elements because it has advantages over conventional digestion techniques such as reduced levels
of contamination and sample preparation time, possibility of spatial distribution analysis of elements,
high number of repetitions, among others. This technique still has some limitations, especially with regard
to calibration, which may result in inaccurate chemical analyses. The present study aims to compare two
types of analyzers (quadrupole and magnetic sector field) regarding precision and accuracy. Certified
material was examined, and also plant material analyzed by both solution in inductively coupled plasma
optical emission spectrometry (ICP OES) and by laser ablation methods. It was observed that the magnetic
sector field analyzer gave better results in relation to precision (relative standard deviation - RSD) and
accuracy (recovery). An elemental composition pattern similar to that of the sample to be analyzed is
relevant to validate the methodology for the analysis of leaves collected under different environmental
conditions. Thus, pulverized Eremanthus erytropappus leaves were suggested as a second type of validation
standard to be used in analyzes of plants belonging to the Atlantic and Cerrado Forest biomes.
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Quadrupole, Magnetic sector field, Calibration, Plant tissue analysis
Citação
DINIZ, A. P. et al. Quantitative analysis of plant leaf elements using the LA-ICP-MS technique. International Journal pf Mass Spectrometry, v. 435, p. 251-258, 2019. Disponível em: <https://www.sciencedirect.com/science/article/pii/S1387380618302033>. Acesso em: 11 fev. 2019.