1987 Volume 36 Issue 3 Pages 174-178
The ion chromatographic determination of trace amounts of lithium in river and drinking waters was investigated using a pressurized regenerant reservior and sample injector systems with pure nitrogen gas (>99.9%, about 3 psi). The conditions for the ion chromatography of the sample water were as follows : separator column, HPIC-CG 250 mm×4 mm i.d.+HPIC-CS2 250 mm×4 mm i.d., at room temperature; eluent, 8 mM HCl(1.6 ml/min); suppressor, cation fiber suppressor (CFS) system; regenerant, 0.02 M KOH (1.6 ml/min); detector, conductivity; sample volume, 50μl, respectively. The response (peak area, as the counts of a digital integrator of the conductivity detector) to the lithium was linear in the range of 23000 ppb. The minimum detectable concentration of lithium was about 1 ppb at S/N= 2. The analytical precision was 4.4% in the relative standard deviation. The detected concentration ranges of the lithium in river waters, was <0.536 ppb; and that in the drinking water was <0.555 ppb, respectively.
