Data/hora: 08/06/2024 06:40:37

Biblioteca(s): 	Embrapa Instrumentação.	
Data corrente: 	23/02/2005	
Data da última atualização: 	18/01/2013	
Autoria: 	CRUVINEL, P. E.; CRESTANA, S.; ARTAXO, P.; MARTINS, J. V.; ARMELIN, M. J. A.	
Título: 	Studying the spatial variability of Cr in agricultural field using both proton induced X-ray emission (PIXE) and neutron activation analysis (NAA) technique.	
Ano de publicação: 	1995	
Fonte/Imprenta: 	In: INTERNATIONAL CONFERENCE ON PARTICLE INDUCED X-RAY EMISSION AND ITS ANALITICAL APPLICATION, 7., May, 1995, Padua, Italy. Program and abstracts book... Padua: [s.n.], 1995. p. 53.	
Idioma: 	Português	
Conteúdo: 	In the Field of soil physics, a technique which permits a non destructive, accurate and fast elemental analysis with a minimum of sample preparation effort is often desired. Although trace elements are minor components of the solid phase, they play an important role in soil fertility. Cr is of nutritional importance because it is required element in human and animal nutrition. The Ímmobiliiy of Cr may be responsible for an inadequate Cr supply to plants. This work demonstrates not only the suitability of PIXE as a fast and non-destructive technique useful to measure Cr content in soil samples but also a study of spatial variability of that element in agricultural field is outlined. To demonstrate the capabiliiy of the method soil samples were collected inside an agricultural field having 3500m2. The soil samples were analyzed using both PIXE and NAA technique. Besides, it was used Fourier spectral analysis to verify the distribution of Cr along of lhe sampled field. NAA were carried out by means of the y ray emitted by the photo peak of 51 Cr (320 keV). Results showed that there is a good linear relationship between the elemental concentration of Cr obtained using those techniques, i.e. a correlation coefficient of r2=O.82 was achieved.	
Palavras-Chave: 	Cr; NAA; sistema PIXE; spatial variability.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Instrumentação (CNPDIA)	
Exemplares: 	CNPDIA - (8664-1) - UPC - SP - -- - PROCI-95.00032 -  - 1995.00032 - DIS