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A. Javier Aller
University of Leon Department of Biochemistry and  Molecular Biology,   Area of Analytical Chemistry,   Faculty of Biological and Environmental Sciences, E-24071  Leon,  Spain  
+ 34 87 291 536
+ 34 87 291 226
A. Javier Aller
dbbjaf@unileon.es
Research interests are focused on the development of analytical methodologies based on various spectroscopic techniques. Main topics include speciation and solid sampling in atomic absorption spectroscopy, while main application fields are in biological, environmental, geological and industrial (ultra-)trace element analysis. One of the primary interests these days is in the nature of interference mechanisms and their consequences on atomization processes in a graphite atomizer. 
 
Other research field is focused on the use of bacterial cells as analytical tools such as biosorbents. Some of his findings have emerged using lyophylized as well as living bacterial cells. This evolution in the type of bio-sorbents used has permitted to increase selectivity of the uptake process making possible the achievement of speciation studies in last term. Another trend was the replacement of monoelemental detection by multidetection systems. In this way, atomic absorption spectroscopy was replaced by Fourier transform infrared spectrometry.

Prof. Aller is also heading a research group dealing with the characterisation of coal fly ashes. Main methods for this research are atomic spectroscopy, scanning electron microscopy/energy dispersive X-ray spectrometry and vibrational spectroscopy. He is still in the process of analyzing the behaviour of coal fly ashes as an environmental problem and their possibilities to be recycled.


 

  • Atomic Absorption Spectrophotometer, Termo Jarrel Ash SH 11, equipped with a graphite furnace, model 188.
  • Plasma Emission Spectrometer, AI 1000/2000.
  • Fourier Transform Infrared Spectrometer, Perkin Elmer, model System 2000, equipped with an air-refrigerated deuterium triglycine sulphate detector.
  • Scanning Electron Microscope JEOL, model JSM-6100, equipped with an energy dispersive X-ray detection (LINK) system.
  • Proportional counter, Canberra, low background, model 2404.
  • Intrinsic germanium Detector, Canberra, model GR 2520, joined to an electronic chain for gamma spectrometry containing a high voltage source, amplifier and a multichannel analyzer, Canberra, de 4000 canales, model System 30 Plus.



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