Synthesis and characterization of a 3-hydroxy-4-pyridinone chelator functionalized with a polyethylene glycol (PEG) chain aimed at sequential injection determination of iron in natural waters

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Raquel B R Mesquita (Autor) Outra; Tania Moniz (Autor) Outra; Joana L A Miranda (Autor) Outra; Vania Gomes (Autor) Outra; Andre M N Silva (Autor) Outra; Rodriguez Borges, JE (Autor) FCUP; Antonio O S S Rangel (Autor) Outra; Maria Rangel (Autor) ICBAS

Revista

Título: Polyhedron

Vol. 101

Páginas: 171-178

ISSN: 0277-5387

Editora: Elsevier

Indexação

ISI Web of Knowledge - 13 Citações

Scopus - 13 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-00G-P5D

DOI: 10.1016/j.poly.2015.09.015

Abstract (EN): The synthesis of a highly water soluble 3-hydroxy-4-pyridinone ligand, functionalized with a hydrophilic ethylene glycol chain (PEG-HPO), was successfully achieved and is reported together with that of its iron (III) complex. The improved hydrophilicity of both the PEGylated 3,4-HPO ligand and its iron(III) complex were fully investigated in an analytical application and, the new chelator is proposed for the spectrophotometric sequential injection determination of iron in waters. The new ligand provided better sensitivity and a lower LOD for iron determination than that obtained for N-alkyl-3-hydroxy-4-pyridinone ligands. The developed sequential injection method presents a dynamic working range of 0.10-1.00 mg Fell. with a LOD of 48 mu g/L. Due to the use of a sequential injection system, the overall effluent production was <2 mL corresponding to the consumption of 44 mu g of PEG-HPO, 0.71 mg of NaHCO3, 0.92 mg of HNO3 and 500 mu L of sample. Two reference samples were assessed for accuracy studies and a relative deviation <5% was obtained; eight waters samples were analyzed and the results compared with the reference procedure, and no statistical difference was observed for the two sets of results.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8