Determination of iron in soils by flow injection atomic absorption spectrometry

• Tipo: Artigo em Revista Científica Internacional
• Data: 1998

Autores

Ferreira, AMR (Autor) Outra; Rangel, AOSS (Autor) Outra; Lima, JLFC (Autor) FFUP

Revista

Título: Communications in Soil Science and Plant Analysis

Vol. 29

Páginas: 2407-2414

ISSN: 0010-3624

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 3 Citações

Outras Informações

ID Authenticus: P-001-8WE

DOI: 10.1080/00103629809370120

Abstract (EN): A single-channel flow injection system was optimized for the determination of available iron (Fe) in soil extracts by atomic absorption spectrophotometry. This method of introducing the samples in the spectrophotometer worked particularly well in preventing blockage of the burner head which was observed in the conventional introduction of Fe for its determination by atomic absorption spectrophotometry. The appropriate selection of the manifold parameters, such as injection volume, tube length and flow rate, allowed introduction of any soil extract without requiring any pre-treatment. This system allowed determinations at a detection limit of 0.36 mg L-1 to 5 mg L-1, with an output of 300 determinations per hour. The results obtained for analysis of 15 soil extracts were in good agreement with those provided by the colorimetric method, with average relative deviations of 1.6%. Relative standard deviations of 4.8, 2.5, and 2.3% were obtained for contents of 1.03, 1.85, and 3.99 mg Fe L-1, respectively.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8