University of North Florida
Browse the Citations

Contact Info

Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

View Stuart Chalk's profile on LinkedIn


Classification: Environmental -> water -> borehole

Citations 1

"Online Preconcentration Of Silver On Activated Alumina And Determination In Borehole Water By Flow Injection Atomic Absorption Spectrophotometry"
Fresenius J. Anal. Chem. 1990 Volume 336, Issue 3 Pages 201-204
P. P. Coetzee, I. Taljaard and H. de Beer

Abstract: Silver in borehole water is pre-concentrated on a polyethylene micro-column (3 cm x 1 mm) of activated alumina (basic form) connected to a flame AAS instrument (schematic diagram given). Sample (pH 4.0) is passed through the column for 3 to 6 min at 5 mL min-1 with water as carrier stream, elution is with 0.5 mL of 2 M HNO3 and regeneration is with 0.15 M NH4OH (2 min at 5 mL min-1). The effluent is directed to a nebulizer and analyzed by AAS at 328.1 nm. The calibration graph is rectilinear for up to 100 µg mL-1 of Ag, with coefficient of variation (n = 10) of ±5 and 18% for >10 and 5 µg l-1, respectively. The detection limit is 4 µg l-1. Sodium, Mg and Ca salts at 0.1 M to 0.5 M decrease the Ag signal by 10%.
Silver Spectrophotometry Sample preparation Preconcentration Activated alumina Nebulizer Calibration Detection limit Solid phase extraction