Fluidized beds in flow analysis: use with ion-exchange separation for spectrophotometric determination of zinc in plant digests

• Tipo: Artigo em Revista Científica Internacional
• Data: 2006

Autores

Ribeiro, MFT (Autor) Outra; Dias, ACB (Autor) Outra; Santos, JLM (Autor) FFUP; Lima, JLFC (Autor) FFUP; Zagatto, EAG (Autor) Outra

Revista

Título: Analytical and Bioanalytical Chemistry

Vol. 384

Páginas: 1019-1024

ISSN: 1618-2642

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 29 Citações

Scopus - 29 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-004-NAY

DOI: 10.1007/s00216-005-0257-5

Resumo (PT): A novel strategy for utilization of solid reagents in flow analysis is proposed. Establishment of diffuse and reproducible geometry enables the solid particles to be maintained in constant floating, reflux, and circulating motion inside a mini-chamber. This is efficiently accomplished with pulsed flows, a characteristic of multi-pumping flow systems. Drawbacks inherent in solid-phase packed columns, for example backpressure, preferential pathways, swelling, etc., and some limitations inherent in immobilized reagents are minimised. Spectrophotometric determination of zinc in plants was selected as an application of the technique. Dowex 1-X8 anionic resin was kept freely inside a mini-chamber. Zinc chloro-complexes were adsorbed on the moving particles and derivatization with zincon was performed after elution. Analytical figures of merit and the potential and limitations of the approach are discussed. <br> <br> Keywords Fluidized bed - Ion exchange - Multi-pumping flow system - Flow analysis <br> <a target="_blank" href="http://www.springerlink.com/content/f421u3145638765m/?p=60aa3d6d5c1c476886afbd1e2a2a52fc&pi=23"> Texto integral </a> <br> <br>

Abstract (EN): A novel strategy for utilization of solid reagents in flow analysis is proposed. Establishment of diffuse and reproducible geometry enables the solid particles to be maintained in constant floating, reflux, and circulating motion inside a mini-chamber. This is efficiently accomplished with pulsed flows, a characteristic of multi-pumping flow systems. Drawbacks inherent in solid-phase packed columns, for example backpressure, preferential pathways, swelling, etc., and some limitations inherent in immobilized reagents are minimised. Spectrophotometric determination of zinc in plants was selected as an application of the technique. Dowex 1-X8 anionic resin was kept freely inside a mini-chamber. Zinc chloro-complexes were adsorbed on the moving particles and derivatization with zincon was performed after elution. Analytical figures of merit and the potential and limitations of the approach are discussed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6