Classification of some species, genera and families of plants by x‐ray spectrometry

Alexandre, Thais Levatti; Bueno, Maria Izabel M. S.

doi:10.1002/xrs.900

Cited by 29 publications

(16 citation statements)

References 11 publications

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“…The work is going in two directions -either to differentiate the whole patterns, or to find the differences between selected species. The role of XRF in both versions, both WD and ED [29], can be significant. Although the essential idea of using chemistry for establishing species segregation is intuitively based on the differences either in DNA, optionally RNA or on differences in proteins and here the XRF is much useless, the smart use of the method can be very profiting.…”

Section: New and Unique Applicationsmentioning

confidence: 98%

New applications of the good old wavelength-dispersive X-ray fluorescence

Kuczumow

Wolski

2011

Pramana - J Phys

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Wavelength-dispersive X-ray fluorescence can be characterized by its advantages and drawbacks. Unbeaten spectral resolution in a range below 5 keV, good operational stability, excellent ability of making averaged analysis, and good presentation of peak shape which gives the basis for the chemical speciation are the advantages. Among the drawbacks, the following are important: system with sequential analysis of particular elements, low output of energy supplied to the device, and great cost of instrument which can be amortized only in routine operations. In routine geological and environmental analyses, the WD-XRF performs better than other simpler instrumental or wet techniques. WD-XRF is continuously improved, by applying new multilayer interference mirrors (MIM) for detection and quantification of very light elements. Bad spectral resolution of MIM noted earlier is now improved by tailoring their shape to the shape of gratings. The progress in the long wavelength spectral region joined with efficient and precise wavelength resolution systems enables the application of WD-XRF for speciation analysis. In another effort, XRF spectrometry is treated as a tool for obtaining quantitative basis for the judgement on Linnaean systematic classification of plants and opens the field to a new discipline -quantitative biology.

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Section: New and Unique Applicationsmentioning

confidence: 98%

New applications of the good old wavelength-dispersive X-ray fluorescence

Kuczumow

Wolski

2011

Pramana - J Phys

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“…Além disso, na Botânica,é possível ver a técnica de XRF sendo utilizada na classificação de algumas espécies, gêneros e famílias de plantas, além da possibilidade de analisar e determinar a presença de cobre e molibdênio em plantas [13][14]. Em outrasáreas, temos exemplos de aplicações em arqueologia sendo utilizada em análises de peças de ouro e em estudo de fluídos mineralizadores em depósitos epitermais [15][16].…”

Section: Xrf E Suas Aplicaçõesunclassified

A utilização e a relevância multidisciplinar da fluorescência de raios X

Nascimento-Dias

Oliveira

Anjos

2017

Rev. Bras. Ensino Fís.

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A utilização das aplicações tecnológicas baseadas nos princípios científicos em raios X durante muito tempo foram utilizadas apenas como ferramentas de diagnósticos médicos. Contudo, a espectroscopia de fluorescência de raios X tem demonstrado possuir uma grande relevância multidisciplinar em inúmeros campos de investigação tais como: meteorítica, química, biologia, meio ambiente, geociências, arqueometria e ciência dos materiais. Buscamos fornecer uma breve síntese seletiva dos recentes trabalhos, buscando assim demonstrar a ampla gama de questões, nas quais ela pode ser aproveitada de maneira produtiva, principalmente devidoà sua característica de ser uma técnica não destrutiva. Por fim, serão discutidas aqui as possibilidades de aplicações de forma sucinta e as vantagens específicas da fluorescência de raios X. Palavras-chave: XRF, física aplicada, ciências dos materiais, meteoritos, técnica analíticaThe utilization of technological applications based on scientific principles in X-rays for a long time were only used as medical diagnostic tools. However, X-ray fluorescence spectroscopy has been shown to have a high multidisciplinary relevance in many research fields such as; Meteoritc, chemistry, biology, environment, geosciences, archeometry and materials science. We seek to provide a selective synthesis of the recent works, demonstrating a wide range of issues which can be harnessed productively mainly because of its characteristic of being a non-destructive tech-nique. Finally, here will be discusses the possibilities of applications and the specific advantages of X-ray fluorescence Keywords: XRF, applied physics, sciencie of materials, meteorites, technique analytical IntroduçãoMuitos físicos eminentes no final do século XIX acreditavam que a natureza do mundo físico estava substancialmente esclarecida. Entretanto, este paradigma foi rompido já nestaépoca por uma série de descobertas em um curto intervalo de tempo. Muitas dessas descobertas envolviam inovações científicas provenientes do estudo de radiações e ondas eletromagnéticas. Neste período, ocorreu a descoberta dos raios X em 1895 por Wilhelm Conrad Roentgen, a radioatividade foi observada pela primeira vez em 1896 por Henri Becquerel e o elétron foi descoberto por Joseph John Thomson em 1897.No entanto, dentre tantas descobertas e acontecimentos científicos marcantes que ocorreram nestaépoca, talvez possa ser dito que a descoberta que possuiu a maior importância para a origem e desenvolvimento das tecnologias baseadas em raios X , tenha sido a de Wilhelm Conrad Roentgen a partir do experimento com raios catódicos [1]. Basicamente, o fenômeno para se produzir raios X, nessa ocasiãoé decorrente de feixes de elétrons que são emitidos por um fio aquecido e que são atraídos * Endereço de correspondência: bruno.astrobio@gmail.com.por uma placa metálica com polaridade positiva (anodo) com relação a placa emissora (catodo), com todo este esquema funcionando dentro de um recipiente com atmosfera rarefeita. Além disso, logo após o primeiro registro da ossatu...

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“…This nondestructive technique showed good results for other types of samples, such as vegetable oils, [16] varnishes [17] and sugar, [18,19] being able to classify them according to a common characteristic or to determine a given variable using multivariate calibration. [20][21][22] The XRSS is based on the analysis of the position of the Raman scattering related to the Rayleigh and Compton ones, according to the chemical environment of the sample. In 1967, Suzuki, [10] working with high spectral resolution and using pure samples of Li, Be, B and C and varying the incidence angle of X-ray source, observed that the positions of Raman and Rayleigh scatterings did not change but a shift in the position of the Compton scattering was observed.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Al content in aluminum‐modified SiO₂ stationary phases using X‐ray scattering spectroscopy

et al. 2013

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This paper describes the determination of aluminum in the presence of silica using a method based on X-ray scattering spectrometry coupled with chemometric tools (principal component analysis and partial least squares) that treat samples according to their Al concentrations.Samples were prepared by mixing Al and Si oxides. X-ray spectra of all samples, including pure oxides of aluminum and silicon, were submitted to the chemometric tools. Principal component analysis results show that it is possible to classify three subgroups of Al (low, medium and high Al content), whereas partial least squares 1 was used to construct calibration and cross-validation models for Al in the presence of Si.The method is simple, fast, does not require sample dissolution prior to analysis, is of low cost and can be applied as a routine procedure. The method was used to quantify Al in some chromatographic stationary phases covered with a layer of Al 2 O 3 . Good correlations with low errors were obtained.

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Classification of some species, genera and families of plants by x‐ray spectrometry

Cited by 29 publications

References 11 publications

New applications of the good old wavelength-dispersive X-ray fluorescence

New applications of the good old wavelength-dispersive X-ray fluorescence

A utilização e a relevância multidisciplinar da fluorescência de raios X

Determination of the Al content in aluminum‐modified SiO₂ stationary phases using X‐ray scattering spectroscopy

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Classification of some species, genera and families of plants by x‐ray spectrometry

Cited by 29 publications

References 11 publications

New applications of the good old wavelength-dispersive X-ray fluorescence

New applications of the good old wavelength-dispersive X-ray fluorescence

A utilização e a relevância multidisciplinar da fluorescência de raios X

Determination of the Al content in aluminum‐modified SiO2 stationary phases using X‐ray scattering spectroscopy

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Determination of the Al content in aluminum‐modified SiO₂ stationary phases using X‐ray scattering spectroscopy