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

• Type: Article in International Scientific Journal
• Date: 2015

Authors

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

Journal

Title: Polyhedron

Vol. 101

Pages: 171-178

ISSN: 0277-5387

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 13 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8