Data/hora: 05/06/2024 09:53:20

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	20/10/2021	
Data da última atualização: 	25/08/2023	
Autoria: 	PEREZ, D. V.; CAMPOS, R. C. de.	
Afiliação: 	DANIEL VIDAL PEREZ, CNPS; REINALDO C. DE CAMPOS, PUC-RIO.	
Título: 	The effect of two kinds of eluents on the speciation of Al, Mn, and Fe by size-exclusion chromatography of some Brazilian soil solutions.	
Ano de publicação: 	2005	
Fonte/Imprenta: 	Chemical Speciation & Bioavailability, v. 17, n. 3, p. 109-116, 2005.	
DOI: 	https://doi.org/10.3184/095422905782774865	
Idioma: 	Inglês	
Conteúdo: 	Size-exclusion chromatography is a powerful tool for distinguishing dissolved organic matter in relation to its molecular size. However, problems may arise in the choice of the most appropriate eluent composition, regarding the gel used. In the present work, soil solution samples from four Brazilian topsoils were analyzed by high-performance liquid chromatography (HPLC) using a size-exclusion polymer-based column (Superdex 75 HR 10/30, Pharmacia). Water and 0.01 mol L-1 NaCl were investigated as mobile phases. The analysis of the UV peak distribution as well as their corresponding Fe, Mn, and Al concentrations suggested that the salt solution should be preferred since it minimizes unwanted interactions between the sample and the support material. Fe, Mn, and Al speciation calculated by the Geochem-PC program involving the Mattigod and Sposito Mixed Model was compared with the Fe, Mn, and Al-organic complex concentrations determined by SEC-HPLC/GFAAS. No correlation was found for Mn and Fe. For Al a significant non-linear correlation was observed.	
Palavras-Chave: 	Geochem-PC; SEC-HPLC.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/227074/1/The-effect-of-two-kinds-of-eluents-on-the-speciation-2005.pdf	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (20870-1) - UPC - AP - DD -  -  -  - DIS