Levels of selected metals in teff grain samples collected from three different areas of  Ethiopia by microwave plasma-atomic emission spectroscopy

Gebregewergis, Abraha; Chandravanshi, Bhagwan Singh; Redi‐Abshiro, Mesfin

doi:10.4314/bcse.v34i3.2

Cited by 17 publications

(11 citation statements)

References 15 publications

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“…In general, the pattern of concentration of metals in teff samples from the three administrative zones was in decreasing order of K > Mg > Ca > Fe > Na > Mn > Zn > Cu > Cr > Ni > Co > Cd. The concentrations of Fe, Mn, Zn, Cu, Ca, Co, Mg, Na, and K in this study were in agreement with the previous studies [ 25 – 27 ]. The concentration of K was the most abundant element, followed by Mg and Ca in teff samples corroborated with the previous studies [ 26 , 28 – 30 ].…”

Section: Resultssupporting

confidence: 93%

Multielement analysis coupled with chemometrics modelling for geographical origin classification of teff [Eragrostis tef (Zuccagni) Trotter] grains from Amhara Region, Ethiopia

et al. 2023

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Teff [Eragrostis tef (Zuccagni) Trotter] is an indigenous crop in Ethiopia, and Amhara region is the predominant teff producing region in the country. This study was aimed at developing an analytical methodology useful to determine the geographical origin of teff produced in the Amhara Region, based on multielement analysis combined with multivariate statistical techniques. For this, a total of 72 teff grain samples were collected from three zones (West Gojjam, East Gojjam, and Awi) and analysed for K, Na, Mg, Ca, Mn, Cu, Fe, Co, Ni, Zn, Cr, and Cd contents using inductively coupled plasma-optical emission spectroscopy (ICP-OES). The digestion and ICP-OES analysis method were accurate, with percentage recovery ranging 85.5 to 109% across the different metals analysed. Principal component analysis (PCA) and linear discriminant analysis (LDA) were applied to discriminate samples based on their production regions. Magnesium, Ca, Fe, Mn, and Zn were the most discriminating elements among the samples. The LDA model provided 96% correct classification of samples into production regions and varietal types, with an average prediction ability of 92%. Hence, the multielement analysis combined with statistical modeling can be used in the authentication of the geographical origin and varietal type of teff from Amhara region.

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Section: Resultssupporting

confidence: 93%

Multielement analysis coupled with chemometrics modelling for geographical origin classification of teff [Eragrostis tef (Zuccagni) Trotter] grains from Amhara Region, Ethiopia

et al. 2023

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“…For the determination of limit of detection of the analytical method (LOD), triplicate eight blanks were prepared in parallel and analyzed for their metal contents. The standard deviation (SD) of the eight blanks was calculated and multiplied by three (LOD = 3SD b ) to determine the method detection limit [9,1]. The limit of quantification (LOQ) is the smallest quantity of analyte that can be measured with acceptable accuracy and precision and it is described as ten times of the standard deviation [10].…”

Section: Methods Of Detection and Quantification Limitsmentioning

confidence: 99%

Adjusting Acid Digestion Procedure to Determine the Concentration Levels of Essential Metals in Teff Samples

Gebregewergis¹,

Achenef²

2022

WJAC

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“…Similarly, the volume ratio of the two acids was kept constant while varying the total volume. Different volumes of nitric and perchloric acids are commonly used for the decomposition of plant materials [20][21][22][23][24][25][26]. Therefore different volumes of nitric and perchloric acids were used for the decomposition of traditional toothbrushes in this study.…”

Section: Optimization Of the Digestion Procedures For Selected Traditional Toothbrush Samplesmentioning

confidence: 99%

Assessment of metals content of widely used traditional toothbrushes in Addis Ababa, Ethiopia

Mulualem¹,

Chandravanshi²

2021

Bull. Chem. Soc. Eth.

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ABSTRACT. Traditional toothbrushes are used by the vast majority of people who cannot afford to buy the commercial toothbrush and toothpaste. The traditional toothbrushes are generally obtained from any slim woody part of a toothbrush tree. The main purpose of this study was to determine selected metals (Ca, Fe, Mg, Al, Cu, Cr, Ni, Zn, Mn, Pb, and Cd) in traditional toothbrushes obtained from three plants including Ligustrum vulgare L., Phoenix reclinata and Olea africana, which are extensively used in Addis Ababa, Ethiopia, by using microwave plasma-atomic emission spectroscopy (MP-AES) after wet digestion. Recoveries of the metals in spiked samples varied from 90.4–107%. The overall mean concentrations determined (mg/kg, dry weight) were in the ranges of Ca (4267–36514) > Fe (131–318) > Al (81.6 –224) > Mg (45.6–122) > Zn (27.2–175) > Mn (20.1–29) > Cu (6.6–20.3) > Cr (6.7–8.9) > Ni (2.6–7.9). Analysis of variance at 95% indicated significant differences in the metals’ contents of three toothbrushes. The results indicated that the selected traditional toothbrushes are good sources of essential metals and free from Pb and Cd. Therefore, the investigated Ethiopian traditional toothbrushes are found to be safe for human use. KEY WORDS: Metal contents, Traditional toothbrushes, Wild privet (Ligustrum vulgare), Wild date palm (Phoenix reclinata), African wild olive (Olea africana), Ethiopia Bull. Chem. Soc. Ethiop. 2021, 35(2), 257-272. DOI: https://dx.doi.org/10.4314/bcse.v35i2.4

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Levels of selected metals in teff grain samples collected from three different areas of Ethiopia by microwave plasma-atomic emission spectroscopy

Cited by 17 publications

References 15 publications

Multielement analysis coupled with chemometrics modelling for geographical origin classification of teff [Eragrostis tef (Zuccagni) Trotter] grains from Amhara Region, Ethiopia

Multielement analysis coupled with chemometrics modelling for geographical origin classification of teff [Eragrostis tef (Zuccagni) Trotter] grains from Amhara Region, Ethiopia

Adjusting Acid Digestion Procedure to Determine the Concentration Levels of Essential Metals in Teff Samples

Assessment of metals content of widely used traditional toothbrushes in Addis Ababa, Ethiopia

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