A purely instrumental neutron activation analysis method, using high resolution gamma-ray spectrometry with intrinsic Ge and
Ge(Li) detectors, has been used for the analysis of trace elements in copper concentrate samples. Seven rare earth elements
and eight other trace elements were determined with good precision. Standard rocks were also analyzed to check the analytical
procedure, and the results obtained are in good agreement with literature values.
The intake of some “newer” trace elements via the daily diet by Iranian population groups was determined. The total mixed
diets were prepared on the basis of dietary recording. Aluminium and nickel have been measured via atomic absorption spectrometry,
vanadium and tin via radiochemical neutron activation analysis, and scandium via instrumental neutron activation analysis.
The results for the Iranian diets are discussed and compared with corresponding data from other countries. The project has
been performed in the frame of a co-ordinated research project of the International Atomic Energy Agency with participants
from various countries.
The intake of aluminum, arsenic, cadmium, lead and mercury via the daily diet by Iranian population groups was determined.
The relevant daily diets were prepared through dietary recording and duplicate portion, and the trace elements were measured
using analytical methods based on NAA, ICP and AAS. The results for the Iranian diets are discussed and compared with corresponding
ones from other countries. The project has been performed in the frame of a co-ordinated research project of the International
Atomic Energy Agency with participants from various countries.
Authors:Sun Laiyan, Lu Fengying, Su Rongwei, and Zhen Houxi
The concentrations of trace elements As, Br, Cd, Cr, Cu, Hg, Pb, Sb, Se and Zn in Chinese foodstuffs were determined by instrumental or radiochemical neutron activation analysis or atomic absorption spectrometric methods. 1198 samples including 20–25 kinds of main foodstuffs were analyzed. The results are given and the daily intake of the trace elements for population groups concerned have been calculated.
Authors:N. Aras, G. Yilmaz, S. Alkan, and F. Korkusuz
There is an evidence that some of the essential trace elements are crucial determinants of bone health. Excess or deficiency
of these elements has a role in the development of bone diseases, therefore research on trace elements in bone is very important.
Iliac crest bone biopsies were optioned from twelve persons undergoing orthopedic surgery due to any reason than osteoporosis.
Cortical and trabecular parts were separated, and blood and fats were removed. Up to 30 minor and trace elements were determined
in these samples by instrumental neutron activation analysis and other techniques and their relations were discussed.
Desserts are the most aromatic and delicious parts of meals, and also a source of nutrient trace elements for the human body. In this work, instrumental neutron activation analysis has been applied to determine the trace elements antimony, chromium, cobalt, iron, manganese, potassium, rubidium, scandium, sodium and zinc in creme caramel, ice-creams, jellies and mousse dried desserts from the Greek market. According to our results, their classification as nutrient trace element sources for the human body is: mousse>ice-cream>creme caramel>jelly. Among the different studied flavours, chocolate and its derivatives are the richest in nutrient trace elements. Moreover, the consumption of one portion of a chocolate mousse dessert can offer to the human body about 60% of the daily required chromium, 40% of the daily required iron, 10% of the daily required manganese and potassium and 4% of the daily required sodium.
Authors:T. Ohyama, M. Yanaga, T. Yoshida, H. Maetsu, M. Noguchi, H. Suganuma, T. Omori, R. Hirunuma, and S. Enomoto
A multitracer technique was used to obtain uptake rates of essential trace elements in various organs and tissues in Zn-deficient mice. A multitracer solution, containing more than 20 radioisotopes, was injected intraperitoneally into Zn-deficient state mice and control ones. Uptake rates of the radioisotopes were compared with concentrations of trace elements determined by instrumental neutron activation analysis (INAA) in order to study a specific metabolism of Zn and other essential trace elements, such as Mn, Co, Se, Rb, and Sr. The result suggests that Zn is supplied from bone to other organs and tissues and an increase in Co concentration in all organs and tissues depends on its chemical form, under the Z-deficient state.
The knowledge of the role of trace elements is a necessary condition for the investigation of cataract etiopathogenesis. The deposition of trace elements in eye lens may be influenced by many vital factors and, therefore, the effect of sex, age and locality on the content of these elements was investigated. The determinations of elements were carried out by instrumental neutron activation analysis, and the results were evaluated with the aid of statistical tests. The effect of locality being taken as a set of local ecological factors has been proved as a dominant factor.
Neutron activation analysis was used to determine the concentration of trace elements in 42 samples of black, grey and white opals taken from a number of recognised Australian field. The results were evaluated to determine if a relationship existed between trace element content and opal colour.
Neutron activation analysis was used to determine the concentration of trace elements in 50 samples of orange, yellow, honey, green, blue and pink opals as well as 18 samples of colourless opals taken from a number of recognised fields in Australia, Peru, Mexico and USA. The results were evaluated to determine the relationship between trace element content and opal colour.