Trace elements detection in whole food samples by neutron activation analysis, k0-method

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
Márcia Maia Sathler ◽  
Paula Maria Borges de Salles ◽  
Maria Ângela De Barros Correia Menezes
Keyword(s):  
Trace Elements ◽  
Neutron Activation ◽  
Elemental Composition ◽  
Chemical Elements ◽  
Anthropogenic Activities ◽  
Food Samples ◽  
Activation Technique ◽  
Inorganic Elements ◽  
Environmental Matrices ◽  
K0 Method

The increase in anthropogenic activities has been contributing to considerable increasing of the chemical elements concentration in the environment. One consequence is the need of monitoring the elemental composition of food available for consumption. Numerous techniques have been used to detect inorganic elements in biological and environmental matrices, always aiming reaching lower detection limits in order to evaluate the trace element content in the sample. This study evaluated the presence of inorganic elements in whole food samples, mainly elements on trace levels applying the neutron activation technique, k0-method. This method produces accurate and precise results, without the need of chemical preparation of the samples. For this purpose, four samples of different types of whole foods were irradiated in the TRIGA MARK I IPR-R1 research reactor – located at CDTN/CNEN, in Belo Horizonte, MG, Brazil. It was possible to detect, in total, twenty-three elements. Nine elements are considered essentials, according to nutrition literature, thirteen are not essentials and one, classified as contaminant element by legislation. The majority of the elements determined are not reported in the TACO (Brazilian Table for Food Composition). It means that the professionals of health do not know, in fact, the real chemical elemental composition in foods and the population do not know what they are ingesting in terms of chemical elements and the risks of this ingestion. This study reaffirms the INAA, k0–method, is an efficient technique for detecting trace elements in food samples.

Radiochemical neutron activation analysis for trace elements evaluation of human milk

2003 ◽  
Vol 91 (9) ◽  
Author(s):  
K. P. Gill ◽  
Jamshed H. Zaidi ◽  
S. Ahmad
Keyword(s):  
Trace Elements ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Human Milk ◽  
Elemental Composition ◽  
Income Group ◽  
Radiochemical Neutron Activation Analysis ◽  
Base Line ◽  
The Status

SummaryThe principal objective pursued in this study is to establish the base-line data on the status of elemental composition in human milk from Pakistani subjects of Rawalpindi/Islamabad area. Radiochemical neutron activation analysis (RNAA) methodology was developed and successfully employed to determine the concentration of 18 minor and trace elements (essential, toxic and nonessential) in human milk. This methodology has significantly improved the detection limits of most of these elements due to suppression of Compton background. The data provide the base-line values of these elements in human milk of low- and medium-income group subjects of the region. The results obtained show good compatibility with the data reported by the WHO on elemental composition of human milk from different geological regions.

Analysis of toxic trace elements in sea food samples by neutron activation

1993 ◽  
Vol 169 (1) ◽  
pp. 255-258 ◽  
Author(s):  
S. Sarmani ◽  
A. K. Wood ◽  
Z. Hamzah ◽  
A. A. Majid
Keyword(s):  
Trace Elements ◽  
Neutron Activation ◽  
Food Samples ◽  
Toxic Trace Elements

scholarly journals THE ELEMENTAL COMPOSITION OF THE VEGETATIVE ORGANS OF SORTS REGAL AIR AND SPEAK TO ME OF HEMEROCALLIS HYBRIDA

2020 ◽  
pp. 245-250
Author(s):  
Lyudmila Leonidovna Sedel'nikova ◽  
Ol'ga Vasil'yevna Chankina
Keyword(s):  
Trace Elements ◽  
Elemental Composition ◽  
Mineral Composition ◽  
Western Siberia ◽  
Chemical Elements ◽  
Total Content ◽  
Steppe Zone ◽  
Forest Steppe ◽  
Vegetative Organs ◽  
Ecological Conditions

The data on the content of 22 chemical elements in the leaves and rhizomes of Hemerocallis hybrida plants of the Speak to me and Regal Air varieties growing in soil-ecological conditions of the forest-steppe zone of Western Siberia are presented. The General regularities of accumulation and distribution of macro- and microelements in leaves and rhizomes of plants of two varieties of daylilies are established: excess of the content of many microelements (vanadium, chromium, nickel, rubidium) in rhizomes in comparison with leaves. It was revealed that the concentration of chemical elements in plants differed both in organs and between varieties. The peculiarity of the mineral composition of the Regal Air variety was the excess of the total content of trace elements in 1.5–3 times compared to the variety Speak to me. Concentrations of individual elements in the leaves and rhizomes of daylilies differed significantly. It is shown that in both varieties in the leaves the amount of bromine was 4 times higher than in rhizomes, strontium – 1.5–1.8 times. The concentration of toxicant elements in the phytomass of Hemerocallis hybrida varieties was significantly lower than permissible concentration, which makes it possible to use them for medicinal purposes.

Non-linear character of redistribution of chemical elements in the biosphere components as a result of the living matter activity

2020 ◽  
Author(s):  
Vyacheslav Korzh
Keyword(s):  
Trace Elements ◽  
Elemental Composition ◽  
Chemical Elements ◽  
Environmental Geochemistry ◽  
Universal Constant ◽  
Academic Publishing ◽  
Living Matter ◽  
Linear Character ◽  
Ocean Atmosphere ◽  
Non Linear

<p>Modern problems of acceptable limits of techno-sphere impact on the biosphere, optimizing the interaction of techno-sphere and the biosphere, forecasting consequences of technogenic accidents in the environment and organization of rehabilitation in the post-accident period, place absolutely new demands for knowledge. These challenges require urgent development of new methodological foundations to study mass transfer and transformation of substances, the structure of global biogeochemical systems in the biosphere. Chemical composition of oceans and seas is a result of substance migration and transformation on biogeochemical river-sea and ocean- atmosphere “barriers”, i.e. in sites of “life condensation”. Stability of these processes is the main prerequisite of the hydrosphere ecosystem stability. The use of a methodology of empirical generalization has resulted in establishing a system of chemical elements’ distribution in the hydrosphere which possesses great predictive potentials.</p><p>A comparison of elements’ composition of different phases on the global level within the hydrosphere-lithosphere-soil-atmosphere systems enabled to reveal non-linear character of redistribution of different elements between these phases which reflects a general relative increase of concentration of trace elements in the environment of living organisms due to biogeochemical processes.  These processes are most active at the biogeochemical barriers, i.e. in the localities of "concentrated life" and are therefore inferred to result from the geologic activity of the ubiquitous living matter regulating its environment. The proposed nonlinearity index exhibits definite stability of the resulting living matter impact for different systems approximating 0.7: 1) 0.75 for proto lithosphere - sediment system; 2) 0.67 for river – ocean system; 3) 0.7 for ocean –– atmosphere system. The obtained value is believed to present a universal constant of biosphere reflecting biogenic stabilization of elements’ global cycles in the biosphere in the course of its evolution and corresponds to the biosphere concept of V.I. Vernadsky. The obtained values may be used as a reference values in estimation of the biosphere stability and anthropogenic contribution to transformation of the global biogeochemical cycles.</p><p><strong>References</strong><strong>.</strong></p><p>Vernadsky V.I. (1994) Living Matter and Biosphere. Moscow, Nauka, 672p. (in Russian).</p><p>Korzh V.D. (1974) Some general laws governing the turnover of substance within the ocean-atmosphere-continent-ocean cycle //Journal de Recherches Atmospherioques. France. Vol.8. N.3-4. P. 653-660.</p><p>Korzh V.D. (1991) Geochemistry of the Elemental Composition of the Hydrosphere. Moscow, “Nauka”, 243 p. (in Russian).</p><p>Korzh V.D. (2017) Biosphere. The formation of elemental compositions of the hydrosphere and lithosphere. Saar-Brucken: Lambert Academic Publishing, 63 p. (in Russian).</p><p>Korzh V.D. (2019) Transfer of trace elements in the ocean-atmosphere-continent system as a factor in the formation of the elemental composition of the Earth’s soil cover.//J. Environmental Geochemistry and Health. Vol.41. P. 1-7.</p>

Bestimmung von Spurenelementen in menschlicher Haut / Determination of Trace Elements in Human Skin

1974 ◽  
Vol 29 (7-8) ◽  
pp. 414-416 ◽  
Author(s):  
H Feuerstein ◽  
J Oschinski
Keyword(s):  
Trace Elements ◽  
Neutron Activation ◽  
Human Skin ◽  
Skin Surface ◽  
Activation Technique ◽  
Gold Concentration ◽  
Skin Sample ◽  
Wide Range ◽  
Neutron Activation Technique

Abstract The elements Cu, Ag, Au, Cr, Fe, Zn, As, Mo and W have been determined in human skin using the neutron activation technique. The values are compared to values published in the literature. The values are scattering over a wide range, leading to the assumption of an uneven distribution of the trace elements in human skin. From the results of a special sample it is concluded that carrying a golden ring over a longer period of time will not contaminate the skin by gold or copper. The investigation of a skin sample where gold has been plated out showed a maximum of the gold concentration beneath the skin surface.

Gamma-Ray Spectrometric Analysis of Some Trace Elements in the Human Articular Disc of the Mandible

1963 ◽  
Vol 03 (02) ◽  
pp. 175-182 ◽  
Author(s):  
Bo Bergman ◽  
Rune Söremark
Keyword(s):  
Trace Elements ◽  
Neutron Activation ◽  
Quantitative Data ◽  
Thermal Neutron Flux ◽  
Gamma Ray ◽  
Dry Weight ◽  
Gamma Ray Spectrometry ◽  
Spectrometric Analysis ◽  
Articular Disc ◽  
Group Separation

SummaryBy means of neutron activation and gamma-ray spectrometry the concentrations in the human mandibular articular disc of the following elements have been determined: Na, Mn, Cu, Zn, Rb, Sr, Cd, W, and Au. The discs were obtained at necropsy from seven men and nine women, ranging in age from 56 to 71 years.The activation was carried out in a thermal neutron flux of about 1.7 XlO12 neutrons × cm−2 × sec.−1 for about 20 hours. A chemical group separationwas performed before the gamma-ray spectrometry. Quantitative data based on the dry weight of the cartilage samples were obtained by comparing the photo-peak area of the identified elements with those of appropriate standards.

DISTRIBUTION OF DISSOLVED CHEMICAL ELEMENTS IN THE YENISEI RIVER ESTUARY AND ADJACENT WATER AREA OF THE KARA SEA

2017 ◽  
Author(s):  
Alla Savenko ◽  
Alla Savenko ◽  
Oleg Pokrovsky ◽  
Oleg Pokrovsky ◽  
Irina Streletskaya ◽  
...  
Keyword(s):  
Trace Elements ◽  
River Runoff ◽  
Major Ions ◽  
Chemical Elements ◽  
River Estuary ◽  
Water Area ◽  
Kara Sea ◽  
Yenisei River ◽  
Adjacent Water ◽  
The Yenisei River

The distribution of dissolved chemical elements (major ions, nutrients, and trace elements) in the Yenisei River estuary and adjacent water area in 2009 and 2010 are presented. These results were compared to the data obtained during previous hydrochemical studies of this region. The transport of major cations (Na, K, Mg, Ca) and some trace elements (Rb, Cs, Sr, B, F, As, Mo, U) in the estuary follows conservative mixing. Alkalinity also belongs to conservative components, however this parameter exhibits substantial spatial heterogeneity caused by complex hydrological structure of the Yenisei Bay and adjoining part of the Kara Sea formed under the influence of several sources of desalination and salty waters inflow. Concentrations of Pmin, Si, and V in the desalinized waters of photic layer decrease seaward owing to uptake by phytoplankton. The losses of these elements reach 30–57, 30, and 9% of their supply by river runoff, respectively. The content of dissolved phosphates and vanadium in the intermediate and near-bottom layers of the Yenisei River estuary strongly increases with salinity due to regeneration of precipitated organic matter, whereas silica remineralization is much less pronounced. Barium is characterized by additional input of dissolved forms in the mixing zone in the quantity comparable to that carried out by river runoff. This may be caused by its desorption from river suspended matter due to ion exchange. The transport of dissolved Al and Mn in the estuarine zone is probably controlled by the coagulation and flocculation of organic and organomineral colloids, which is indicated by a decrease in the concentration of these elements at the beginning of the estuary (31 and 56%, respectively) followed by a stable concentration further seaward.

scholarly journals Comparative Effects of Organic and Conventional Cropping Systems on Trace Elements Contents in Vegetable Brassicaceae: Risk Assessment

2021 ◽  
Vol 11 (2) ◽  
pp. 707
Author(s):  
Fernando Cámara-Martos ◽  
Jesús Sevillano-Morales ◽  
Luis Rubio-Pedraza ◽  
Jesús Bonilla-Herrera ◽  
Antonio de Haro-Bailón
Keyword(s):  
Trace Elements ◽  
Organic Agriculture ◽  
Metal Content ◽  
Cropping Systems ◽  
Sinapis Alba ◽  
Soil Characteristics ◽  
Inorganic Elements ◽  
Inorganic Element ◽  
Dietary Reference Intakes ◽  
Brassicaceae Family

Genotypes selected from 3 plant species (Brassica rapa, Eruca vesicaria and Sinapis alba) belonging to the Brassicaceae family were chosen to compare the concentrations of 9 inorganic elements (Cd, Co, Cr, Cu, Fe, Ni, Mn, Pb and Zn) in these varieties, that were grown under both conventional and organic conditions during two agricultural seasons (2018/2019 and 2019/2020) on two different experimental farms (Farm I and Farm II). We found that, together with agriculture practices, the inorganic element concentrations in Brassicas depended on many other factors, including soil characteristics. However, there were no conclusive results indicating a lower heavy metal content or a higher nutritionally beneficial trace elements content in vegetables grown under organic agriculture. Finally, a probabilistic assessment (@Risk) derived from the consumption of 150–200 g of these vegetables showed that organic Brassicas fulfill in comparison with the conventional ones, similar Dietary Reference Intakes (DRI) percentages for Co, Cr, Cu, Fe, Mn and Zn. Regarding heavy metals (Cd, Ni and Pb), we only found slight differences (mainly in the case of Pb) in the Tolerable Intakes (TI) between both cropping systems.

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