Determination of zinc in seawater using flow injection analysis with fluorometric detection

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Nowicki, J. L., Johnson, K. S., Coale, K. H., Elrod, V. A., & Lieberman, S. H. (1994). Determination of zinc in seawater using flow injection analysis with fluorometric detection. Analytical Chemistry, 66(17), 2732-2738.
Metadata
TitleDetermination of zinc in seawater using flow injection analysis with fluorometric detection
AuthorsL. Nowicki, S. Johnson, H. Coale, A. Elrod, H. Lieberman
AbstractA sensitive technique for the shipboard determination of zinc in seawater has been developed. The technique couples flow injection analysis with fluorometric detection (FIA-FL). A cation exchange column was used to separate zinc from interfering alkali and alkaline earth ions and to concentrate Zn from seawater. The organic indicator ligand, p-tosyl-8-aminoquinoline, was used to form a complex with zinc, the fluorescence of which was determined with a flow-through fluorometer. The detection limit (defined as three times the standard deviation of the blank, n = 4) was 0.1 nM for a 4.4-mL sample. The precision based on the replicate analysis of samples containing 4.3 nM Zn was ±6% (n = 5). A single sample can be analyzed in 6 min. The technique was determined to be accurate on the basis of analysis of the standard seawater solutions CASS-2 and N ASS-2 and by comparison with previous reliable investigations. A typical profile of 12 samples along with standards and blanks can be completed in triplicate in 5.5 h.
JournalAnalytical Chemistry
Date1994
Volume66
Issue17
Start page2732
End page2738
ISSN00032700
NoteCited By (since 1996):31, CODEN: ANCHA

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