Determination of iron(III) in water samples by microsequential injection solid phase spectrometry using an hexadentate 3-hydroxy-4-pyridinone chelator as reagent

TALANTA

卷:191

Article

Miranda, Joana L. A.¹  Mesquita, Raquel B. R.^1,2  Nunes, Ana²  Rangel, Maria²  Rangel, Antonio O. S. S.¹ 

[1] Univ Catolica Portuguesa, CBQF, Lab Associado, Escola Super Biotecnol, Rua Arquiteto Lobao Vital 172, P-4200374 Porto, Portugal

[2] Univ Porto, REQUIMTE LAQV, Inst Ciencias Biomed Abel Salazar, Rua Jorge Viterbo Ferreira 228, P-4050313 Porto, Portugal

关键词: Hexadentate 3,4-hydroxypyridinone ligand;    Iron(III) quantification;    Solid phase spectrometry;    Fresh and saline water samples;   

DOI  :  10.1016/j.talanta.2018.08.063

来源: Elsevier

【 摘 要 】

In this work, the hexadentate 3,4-hydroxypyridinone ligand was used as reagent for the spectrophotometric quantification of iron(III) in fresh and sea waters, using a micro sequential injection lab-on-valve (mu SI-LOV) system in a solid phase spectrometry (SPS) mode. To implement SPS, thus eliminating the sample matrix, a packed column in the flow cell was used; the chosen sorbent was Nitrilotriacetic Acid Supefflow resin (NTA). The possibility of performing an analytical curve resorting to just one standard was also demonstrated. The consumption of the hexadentante ligand was about 3014 per determination and the effluent production lower than 2.5 mL. The dynamic concentration range was 0.45-9.0 mu mol L-1, with a limit of detection of 0.13 mu mol L-1 and limit of quantification 0.43 mu mol L-1. The proposed iSI-LOV-SPS methodology was successfully applied to river, ground, estuarine, tap, and sea waters.

【 授权许可】

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