Single-sample cloud point determination of iron, cobalt and nickel by flow injection analysis flame atomic absorption spectrometry - application to real samples and certified reference materials
Φόρτωση...
Ημερομηνία
Συγγραφείς
Giokas, D. L.
Paleologos, E. K.
Tzouwara-Karayanni, S. M.
Karayannis, M. I.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Royal Society of Chemistry
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Journal of Analytical Atomic Spectrometry
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
A preconcentration methodology utilizing the cloud point phenomenon is described for the determination of iron, cobalt and nickel by flame atomic absorption spectrometry (FAAS). The method employs the formation of complexes of the metallic species with ammonium pyrrolidinedithiocarbamate (APDC), which are subsequently entrapped in the micelles of the surfactant TX-114, upon increase of the solution temperature to 70 degreesC. The surfactant micelles, after their dilution to an acidified methanolic solution, are delivered to the nebulizer of the FAAS by a flow injection analysis (FIA) manifold, allowing for the reproducible injection of a small volume of the sample. The ability to handle the final texture of the injected solution allows for the single-step determination of these metal ions, in a single sample, without interferences. Analytical curves were rectilinear up to concentrations of 350 mug l(-1) for Fe, 200 mug l(-1) for Co and 250 mug l(-1) for Ni with detection limits of 19, 5 and 11 mug l(-1), respectively. The method was applied to the analysis of several real and spiked samples yielding satisfactory results. The recoveries obtained were in the range of 97-103% for spiked samples and 98-99.5% for a Certified Reference Material (CRM).
Περιγραφή
Λέξεις-κλειδιά
liquid-chromatographic determination, micelle-mediated methodology, nonionic surfactant, phase-separation, preconcentration, extraction, copper, plasma, water, speciation
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000168391900012
http://pubs.rsc.org/en/Content/ArticleLanding/2001/JA/b010055m
http://pubs.rsc.org/en/Content/ArticleLanding/2001/JA/b010055m
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας