Page 243 - Vogel's TEXTBOOK OF QUANTITATIVE CHEMICAL ANALYSIS

OETERMINATION OF ANIONS USINC ION CHROMATOCRAPHV 7.15

Procedure. Inject 10 pL of standard anion solution into the column and elute
with the borate/gluconate eluant at a flow rate of 1.2mLmin-'. Record the
chromatogram and measure the peak height (or peak area). Repeat this
procedure using the range of standard anion solutions and prepare a calibration
graph of peak height against anion concentration (mg L-') for each of the
anions to be determined. Finally inject 10pL of the anion mixture (e.g. Cl-,
10 ppm; NO;, Br-, NO;, 20 ppm) and record the chromatogram; the elution
sequence is Cl-, NO;, Br- and NO; as shown in the typical chromatogram
(Fig. 7.5). Measure the peak height for each anion and find the anion
concentration by reference to the appropriate calibration graph.

For References and Bibliography see Sections 9.9 and 9.10.