Search Results

You are looking at 1 - 8 of 8 items for

  • Author or Editor: J. Bacsó x
  • Refine by Access: All Content x
Clear All Modify Search

Abstract  

The Ca-concentration has been measured in daily shaven beard samples over a seven-year period. The Ca-concentration range in beard of single individuals is the same as that in the head hair of different groups. Inviduals belonging to the group with low Ca-level (Ca<700 ppm) in hair (endangered group from ischaemic heart diseases) may increase the Ca-level in their hair and get into the group with high Ca-level (Ca>700 ppm; defended group).

Restricted access

Abstract  

A qualitative and quantitative analysis of atmospheric deposition samples has been carried out by XRF method in Debrecen city over a long period. Seasonal variations in the fluxes of 14 elements such as Si, S, Cl, K, Ca, Ti, Mn, Fe, Cu, Zn, Br, Sr, Zr and Pb have been determined. Ca, Si and S elements had the greatest yearly average flux compared to other elements. The atmospheric deposition of most of the elements have higher values in summer than in winter season. Results are compared with literature data.

Restricted access

Abstract  

Different atmospheric aerosol samples were collected on three types of filters. Disks of both loaded and clean areas of each kind of filter were investigated by XRF, PIXE and Scanning Electron Microscope (SEM) methods. The blank concentration values of the elements Al, Si, P, S, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Br and Pb in the three types of fiters are discussed. It is found that for trace elemental analysis, the Nuclepore membrane filters are the most suitable for sampling. These have much lower blank element concentration values than the glass fibres and ash free filters. It was found also that the PIXE method is a more reliable analytical technique for atmospheric aerosol particles than the other methods.

Restricted access

Abstract  

A method is described for Rb and Sr concentration determinations in rocks by radioisotope X-ray fluorescence analysis. The yield/concentration ratios were established by increasing the concentrations of the examined elements in the sample and recording each spectrum. The analytical error in the 100-1,000 ppm concentration range was 2–4%, and for 50 ppm about 10%, and the detection limit was 5–10 ppm.

Restricted access

Abstract  

The effect of source-sample-detector geometry on the analytical sensitivity of Si(Li) detector X-ray spectrometer was investigated. The theoretically calculated and experimentally determined sensitivity values are in good agreement in case of a matrix having average atomic number of Z=10.

Restricted access

Abstract  

The Pb and Br content of plants growing along roads has been determined. It has been stated that the Pb-content of rye grass is proportional to the level of public road traffic. The Pb-content of plants cannot be removed by washing. The Pb, Cu and Zn-concentration of plants grown in the vicinity of smeltery may reach the 10–1000 times value of the normal level.

Restricted access

Abstract  

Lead concentrations of atmospheric particulate matter were measured systematically by X-ray fluorescence method at three sites of Debrecen city over long periods. The time dependence of Pb concentration level in air was investigated and compared with literature data. High variation was found in lead concentration values with respect to place and time.

Restricted access

Abstract  

During a five-year period, the International Atomic Energy Agency supported a Coordinated Research Programme (CRP) to investigate the quantitative relationship between internal body burdens of a number of elements of environmental health significance and their respective concentrations in hair. The use of nuclear-related analytical techniques, such as neutron activation analysis, X-ray fluorescence, particle-induced X-ray emission and radiotracers, was emphasized. One aspect of the CRP focused on studies in man, using autopsy cases, of mineral distribution in five tissues, i.e. liver, kidney, lung, brain and bone in addition to hair, and the elements of primary importance were As, Cd, Cu, Hg, Pb, Se and Zn. Emphasis was placed on analytical quality assurance. Hair and internal tissue samples were obtained from subjects from Bulgaria, China, the former German Democratic Republic, Hungary, Japan, Norway and Sweden.

Restricted access