Page 242 - Vogel's TEXTBOOK OF QUANTITATIVE CHEMICAL ANALYSIS
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7 ION EXCHANCE
Prepare 1 L of the following borate/gluconate eluant* immediately prior to
its use:
Bufer concentrate 20 mL
Acetonitrile 120 mL
Water 860 mL
The eluant must be filtered and de-gassed before use, e.g. using a Millipore filter
system.
Column. A Waters IC-PAK A or equivalent anion exchange column, operating
at ambient temperature. Equilibrate the column with the mobile phase (eluant)
by allowing the latter to flow through the column for 1 hour.
70
10 pl lnjeciion
10 ppm Cl -
20 ppm NOY, Br-, NO;
Flow rate 1.2 mL min-' Gain 0.01 2
60
Sensiiivity range 500 ps
Chan speed 50 cm h- l
50
40
30
20
10
Volume mL
Fig. 7.5
*If necessary, adjust the pH to 8.4-8.5 using boric acid crystals or 0.1 M sodium hydroxide; the
pH of the eluant is critical.
