
Minicolumn Field Sampling-Preconcentration of Trace Zinc from Seawater and Its Laboratory Detection by Flow Injection Flame Atomic Absorption Spectrometry
Author(s) -
M.C. Yebra-Biurrun,
R.M. Cespón-Romero
Publication year - 2006
Publication title -
analytical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 73
eISSN - 1348-2246
pISSN - 0910-6340
DOI - 10.2116/analsci.22.51
Subject(s) - chemistry , seawater , zinc , detection limit , chromatography , elution , atomic absorption spectroscopy , certified reference materials , analytical chemistry (journal) , analyte , factorial experiment , hydrochloric acid , inorganic chemistry , oceanography , physics , statistics , mathematics , organic chemistry , quantum mechanics , geology
A simple field sampling-preconcentration method for zinc determination in seawater is described. Seawater was collected in situ by pumping it through a minicolumn packed with a chelating resin (Chelite P) connected to a field flow preconcentration system (FFPS). These packed minicolumns retain the dissolved zinc, and once are loaded with the analyte, they are returned to the laboratory where they are sequentially inserted into a flow injection system for on-line zinc elution with diluted hydrochloric acid and flame atomic absorption spectrometric detection. A factorial design has been used to optimize the FFPS and the flow injection elution process. The proposed method has a linear calibration range from 0.07 to at least 9.4 microg L(-1) of zinc, with a detection limit of 0.02 microg L(-1) and a throughput of 26 samples h(-1). Validation was carried out against certified reference water samples. This procedure has been successfully applied to the determination of Zn in seawater samples from Galicia (Spain).