Determinação de Mn e Zn em arroz empregando espectrometria de fluorescência de raios x de energia dispersiva

Teixeira, Alete Paixão; Quintella, Cristina M.; Korn, Maria das Graças Andrade; Fernandes, Andréa Pires; Castro, Martha Teresa Pantoja de Oliveira

doi:10.1590/s0100-40422012000600012

Cited by 8 publications

(6 citation statements)

References 14 publications

(18 reference statements)

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“…Analytical applications of benchtop EDXRF systems for elemental analysis of plant materials are experiencing a fast growth. A myriad of vegetal matrices such as coffee, 8 sugar cane, 9 rice, 23,38 barley, 39 pearl millet, 23 spice, 40 tobacco, 41,42 wheat, 43 sorghum, 44 tea, 45,46 medicinal plants, [47][48][49][50] tropical fruits, 51 and others 10,52-54 have been investigated in these studies.…”

Section: Introductionmentioning

confidence: 99%

Comparison of analytical performance of benchtop and handheld energy dispersive X-ray fluorescence systems for the direct analysis of plant materials

Guerra

Almeida

Carvalho

et al. 2014

J. Anal. At. Spectrom.

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Section: Introductionmentioning

confidence: 99%

Comparison of analytical performance of benchtop and handheld energy dispersive X-ray fluorescence systems for the direct analysis of plant materials

Guerra

Almeida

Carvalho

et al. 2014

J. Anal. At. Spectrom.

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“…The analysis of minerals present in MP was performed by energydispersive X-ray fluorescence spectrometry (Teixeira et al, 2012). Initially, the samples were dried at 75°C for 1 h in watch glasses.…”

Section: Mineral Compositionmentioning

confidence: 99%

Nutritional composition, phytochemicals and microbiological quality of the legume, Mucuna pruriens

Tavares¹,

Silva²,

Campos³

et al. 2015

Afr. J. Biotechnol.

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The aim of this study was to evaluate the nutritional and phytochemical compositions and microbiological quality of seeds of the legume Mucuna pruriens (MP) grown in northeastern Brazil. MP flour and extract were produced and evaluated for proximate, mineral, and phytochemical compositions, fatty acid profile, and microbiological quality. MP flour and seed extract showed 43.12 and 43.4% of protein, 7 and 7.6% lipid matter, 37.19 and 33.33% starch, and 5.64 and 2.36% fiber (p<0.05), respectively. Abundant minerals found were in both the extract as flour, such as potassium (635 and 679 mg/g), iron (79 and 158 mg/g), and phosphorus (83 and 93 mg/g). Flavonoids, steroids, and saponins were detected. The main fatty acids found were myristic, palmitic, oleic and linoleic acids. Microbiological evaluation did not indicate the presence of pathogenic or spoilage microorganisms. MP produced in Northeastern Brazil is an alternative source of carbohydrate, fiber, protein, essential fatty acids, minerals, saponins and flavonoids, which may encourage its potential consumption and marketing.

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“…Energy dispersive x-ray fluorescence (EDXRF) has been employed for the analysis of various plant materials including wheat grain (Paltridge et al, 2012a ), rice grain (Paltridge et al, 2012b ; Teixeira et al, 2012 ), pearl millet grain (Paltridge et al, 2012b ), coffee (Tezotto et al, 2013 ), medicinal plants (Queralt et al, 2005 ), sugar cane (Guerra et al, 2014 ), and tree leaves/needles (Stikans et al, 1998 ). The majority of plant analysis reported with XRF requires the sample to be ground and the powder pressed in order to diminish sample heterogeneity, commonly regarded as one of the largest sources of error with EDXRF analyses (Blank and Eksperiandova, 1998 ; Injuk et al, 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Non-matrix Matched Glass Disk Calibration Standards Improve XRF Micronutrient Analysis of Wheat Grain across Five Laboratories in India

Guild

Stangoulis

2016

Front. Plant Sci.

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Within the HarvestPlus program there are many collaborators currently using X-Ray Fluorescence (XRF) spectroscopy to measure Fe and Zn in their target crops. In India, five HarvestPlus wheat collaborators have laboratories that conduct this analysis and their throughput has increased significantly. The benefits of using XRF are its ease of use, minimal sample preparation and high throughput analysis. The lack of commercially available calibration standards has led to a need for alternative calibration arrangements for many of the instruments. Consequently, the majority of instruments have either been installed with an electronic transfer of an original grain calibration set developed by a preferred lab, or a locally supplied calibration. Unfortunately, neither of these methods has been entirely successful. The electronic transfer is unable to account for small variations between the instruments, whereas the use of a locally provided calibration set is heavily reliant on the accuracy of the reference analysis method, which is particularly difficult to achieve when analyzing low levels of micronutrient. Consequently, we have developed a calibration method that uses non-matrix matched glass disks. Here we present the validation of this method and show this calibration approach can improve the reproducibility and accuracy of whole grain wheat analysis on 5 different XRF instruments across the HarvestPlus breeding program.

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Determinação de Mn e Zn em arroz empregando espectrometria de fluorescência de raios x de energia dispersiva

Cited by 8 publications

References 14 publications

Comparison of analytical performance of benchtop and handheld energy dispersive X-ray fluorescence systems for the direct analysis of plant materials

Comparison of analytical performance of benchtop and handheld energy dispersive X-ray fluorescence systems for the direct analysis of plant materials

Nutritional composition, phytochemicals and microbiological quality of the legume, Mucuna pruriens

Non-matrix Matched Glass Disk Calibration Standards Improve XRF Micronutrient Analysis of Wheat Grain across Five Laboratories in India

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