Renewable Column for Atomic Spectroscopy
Xiangbao Long . M. Miró, R. Jensen . E. H. Hansen: Anal. Bioanal Chem (2006) 386: 739–748
3.2.10.
Highly selective micro-sequential injection method for the determination of ultra-trace concentrations of nickel in saline matrices using detection by electrothermal atomic absorption spectrometry.
This approach is based on the formation of the Ni DMG precipitate in the solution held within reaction coil (RC) and subsequent transport of this precipitate, its absorption on, and final elution from a movable column.
Schematic diagram of the µSI-LOV-ETAAS system for on-line determination of Ni(II) via precipitation with DMG and preconcentration on poly (divinylbenzene-co-N-vinylpyrrolidone) beads. Carrier 0.2 mol L-1 ammonium citrate buffer (pH 9.0), DMG 1.2 % (w/v) dimethylglyoxime in ethanol, eluant methanol, SP1 and SP2 syringe pumps 1 and 2, C1 and C2 LOV micro-column positions, HC holding coil, RC reaction coil, CC central communication channel, PP peristaltic pump, ETAAS electrothermal atomic absorption spectrometer
