Methods of Analysis for Toxic Elements in Food Products. 1. Mineralization Methods to Determine Heavy Metals and Arsenic According to the USSR Standard

1989 ◽  
Vol 72 (2) ◽  
pp. 286-290 ◽  
Author(s):  
Igor M Skurikhin

Abstract Results of the work of 22 laboratories in the USSR on optimizing methods for mineralizing foods to determine Pb, Cd, As, Zn, Cu, Sn, and Fe are summarized. Recommendations are given on dry and wet mineralization as related to the analyte and the kind of food product. Optimum amounts of test portions for 22 food groups are also recommended according to the element of interest.

1989 ◽  
Vol 72 (2) ◽  
pp. 290-293
Author(s):  
Igor M Skurikhin

Abstract Methods of analysis prescribed by USSR standards for Hg, Pb, Zn, As, Cd, Cu, Fe, and Sn in foods are described: for Hg—colorimetry of tetraiodide mercurate and atomic absorption spectroscopy (AAS); for Pb, Cd, Zn, and Cu—polarography; for Cu—colorimetry with sodium diethyldithiocarbamate and zinc dibenzyldithiocarbamate; for As—colorimetry with silver diethyldithiocarbamate; for Sn— colorimetry with quercetin; and for Fe—colorimetry with o-phenanthroline. All of the methods have the necessary metrological characteristics, including intralaboratory repeatability value (r), interlaboratory reproducibility value (R), minimum quantity of the element to be determined in the analytical test portion (MQSM), and the coefficients that account for mercury and arsenic losses during analysis. Establishing constant r- and R-values for the methods under consideration is expedient because (a) the methods suggested are used for safety purposes; and (b) the optimum amount of the element studied in the test sample is determined, to a certain degree, by the mass of the test portion.


Author(s):  
V. O. Velychko

One of the main reasons that significantly affect the functional state of the organism, animal and human health, scientists and practitioners consider the environmental state of the environment. This is primarily due to the content of toxicants, in particular heavy metals in feed grown in areas of man-made pollution, the feeding of which leads to impaired metabolism in the animal body. Certain heavy metals (Pb, Cd, Hg, As, etc.) are highly toxic and can affect the body even in very small quantities. Therefore, monitoring the toxic elements in the soil-plant-feed-animal-production-human-chain trophic chain is considered a priority area in research, under conditions of man-made loading. The works of a number of leading scientists, in particular R. Y. Kravtsiv, O. I. Razputny, I. V. Kalinin, Yu. I. Savchenko, R. Fedoruk, indicate that the ability to the accumulation of toxic elements by organisms is determined not only by the geochemistry of the environment, but also by their biological nature and the biogeochemical chain through which the connection between organisms and the environment (soil-plant-animal-human). Unfavorable ecological situation in some regions is caused by violation of requirements for chemical fertilizers, plant treatment with pesticides (herbicides, pesticides, etc.), which is especially characteristic nowadays, when large agro-industrial structures (holdings, concerns, etc.) for the cultivation of intensive crops. The mentioned reasons include animal and poultry growth promoters, certain groups of medicines, uncontrolled industrial emissions, man-made accidents, pollution of the environment by motor vehicle emissions, etc. As a result, the compounds of Plumbum, Cadmium, Hydrargyrum, Strontium and other heavy metals also enter the atmosphere. And what is characteristic (according to literature sources) is that some of them, together with atmospheric moisture, form even more toxic compounds, which in the form of rain fall on farmland and ponds, from where they enter plants and organisms of animals and food, in particular milk and meat. That is why it is necessary to carry out physiological and environmental monitoring, respectively, and control of the migration of harmful elements in the environment, in particular, their receipt and concentration in soils, plants of food groups, feeds, animals and food. In view of this, it is especially important to improve the diets of animals fed under conditions of techno-genic loading using sorbents and their biologically active additives. Such adsorbents R. Y. Kravtsіv and coauthors, O. O. Kalinin include zeolites that have adsorbing, ion exchange, catalytic and other properties, although their use should be carried out taking into account agro-environmental conditions, as well as the forms and properties of xenobiotics, which requires research with scientific and practical substantiation.


Author(s):  
Adrian MAZAREL ◽  
Gabriel ROTARU ◽  
Cristian MATEA ◽  
Andreea BUNEA ◽  
Constantin BELE

Alpha tocopherol is recognized as inhibitor of lipid oxidation in biological systems and the intake of this vitamin is relevant to human health .Catering food products investigated in the current study have been chosen from two food groups: fish based food products and meat based food products.A number of ten food samples were investigated. Alpha tocopherol was analysed using a Shimadzu VP Series liquid chromatograph equipped with a fluorescence detector FR -10 AXL with excitation wavelength of 290 nm and emission wavelength of 325 nm. Data analysis suggest significant loss of tocopherol in meat and fish based food product as compared to the content found in thermal non-treated preparations. Thus, in fish preparation the cook-serve processing by conventional thermal treatment diminishes the tocopherol content by 58%; in case of microwave thermal treatment this loss is 64.5 %. It was found that the microwave thermal treatment generated lower tocopherol content by 10% versus the conventional thermal treatment. In case of thermally non-treated meat preparations the tocopherol content is 0.82 mg/100g product, greater than in fish preparations, but the loss registered by conventional thermal treatment and by microwave thermal treatment is approximately 21,95%, and 25,6%, respectively. In the case of meat preparations, the microwave thermal treatment generates a loss of tocopherol content greater by 16,6 % as compared to the conventional thermal treatment.


2021 ◽  
Vol 9 (2) ◽  
pp. 61-68
Author(s):  
M. S. Galenko ◽  
I. V. Gravel ◽  
N. Yu. Velts ◽  
R. N. Alyautdin

Herbal medicinal products (HMPs) are widely used in medical practice due to their availability, ease of use, and relatively safe pharmacological profile. However, medicinal plants are capable of accumulating heavy metals and arsenic which can have toxic effect on the human body when found in HMPs. The aim of the study was to summarise and analyse requirements of the Russian and foreign pharmacopoeias for the limits of heavy metals and arsenic in HMPs. National and regional pharmacopoeias have limits for the content of the major toxic elements (lead, cadmium, mercury, chromium, and arsenic) in HMPs. The study showed that the Indian and Japanese pharmacopoeias include only semi-quantitative methods for determination of heavy metals and arsenic, while the Russian and Chinese pharmacopoeias allow for the use of both quantitative and semi-quantitative methods. It was demonstrated that the limits for heavy metals and arsenic are the same for herbal substances and HMPs. The development of consistent approaches to determination of heavy metals and arsenic content, a systematic transition to quantitative methods of analysis, and establishment of individual limits for toxic elements in different HMP dosage forms, will make it possible to achieve the so-called consistent harmonisation, ensure reliable assessment of the content of heavy metals and arsenic, and minimize the risk of their entering human body with HMPs.


2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Cyril Ocheri ◽  
A. D. Omah ◽  
C. N. Mbah ◽  
R. E. Njoku ◽  
N. A. Urama ◽  
...  

Heavy metals pollution potential in National Iron Ore Mining Company, Itakpe was investigated. Two mining sites located at the east mining pits such as M3O, which is 370 m above sea level and M2O, which is 350 m above sea level were studied.  Sequential extraction techniques was utilised to examine the distribution effect of the heavy metals pollution potential on the environment. Twelve representative (six-soil, two-sediment, two-plant and two-water) samples were collected, pre-treated and prepared for this study. The atomic absorption spectrometer was used to analyse the concentration of the metals after the sequential and single-stage extractions were determined. Results showed that Chromium, Arsenic, Cadmium and Copper are more bioavailable in the study area than Lead and Iron. This findings indicate that human, animals and plants are exposed to toxic elements (metals and metalloids).


2020 ◽  
Vol 5 (3) ◽  
pp. 4-11
Author(s):  
E. V. Kryuchenko ◽  
Yu. A. Kuzlyakina ◽  
V. S. Zamula ◽  
I. M. Chernukha

The article discusses the definition and mechanism of IgE‑mediated food allergy, provides an overview of the legal regulation of the production and labeling of allergen-containing food products. In order to prevent the inadvertent appearance of allergens in products during their production, an allergenomics procedure is required — a comprehensive assessment of the allergic potential of a food product: allergenicity of product ingredients, risk analysis, and the procedure for managing allergens in the production.


1997 ◽  
Vol 32 (3) ◽  
pp. 523-550
Author(s):  
S.N. Volkov

Abstract In urbanized geotechnical systems (UGSs), the majority of problems related to the ecological hydrochemistry of Cd, Pb, Ni and other heavy metals are the result of emergent characteristics of a system as a whole as opposed to individual pollution sources. In petrochemical UGSs, pollution of the environment from compounds containing methylating or alkylating agents results in an increase in the mobility of Cd, Pb, Ni, Cr and As. This process is controlled by environmental and microclimatic factors rather than by pollution sources. Under conditions of predominant dust and element effects, geo-chemically paradoxical associations of Cd with Ni, Mn and Cr can be formed in the main life support media in mining and metallurgical UGSs. Uncontrolled processes of hydrochemical interactions take place in complex multifunctional UGSs, leading to a change in speciation of heavy metals, particularly cadmium. This report is part of a 5-year study of the geotechnical systems in the Urals.


2019 ◽  
Author(s):  
Dina L. López ◽  
◽  
Abiodun E. Ayo-Bali ◽  
Mauricio Vasquez Jandres ◽  
Benancio Henriquez Miranda

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Monika Rusin ◽  
Joanna Domagalska ◽  
Danuta Rogala ◽  
Mehdi Razzaghi ◽  
Iwona Szymala

AbstractChemical contamination of foods pose a significant risk to consumers. A source of this risk is due to the consumption of products contaminated with heavy metals such as cadmium (Cd) and lead (Pb). The aim of the study was to research the levels of Cd and Pb contamination of selected species of vegetables and fruits in the form of fresh, frozen, dried and processed products. The goal was to verify which of these food groups was more contaminated with heavy metals. The study covered 370 samples of fruits and vegetables including apples, pears, grapes, raspberries, strawberries, cranberries, as well as beetroots, celeries, carrots and tomatoes. The content of Cd and Pb was determined by atomic absorption spectrometry. Quantitative results were analyzed using statistical models: analysis of variance, outlier analysis, post-hoc multiple comparison Tukey test. The tests showed that the levels of Cd and Pb concentration in samples of fresh, processed, frozen and dried fruits and vegetables varied substantially. The highest concentrations were recorded in dried products. Several fruit and vegetable samples exceeded the maximum permissible concentrations of Cd and Pb. The contamination of these products could be a significant source of consumer exposure to heavy metals when these products are a part of the diet.


Sign in / Sign up

Export Citation Format

Share Document