REAGENTS:
1. Water, deionized, filtered, specific
conductance 10 μS/cm.
2. Fixative solution. Dissolve 25 g Na 2CO3 in
deionized water. Add 20 mL glycerol and
dilute with deionized water to 1 L.
3. Eluent: 1.75 mM NaHCO3/2.0 mM Na2CO3.
Dissolve 0.588 g NaHCO 3 and
0.848 g Na 2CO3 in 4 L filtered
deionized water.
4. Calibration stock solutions,
1 mg/mL (as the anion). Prepare
in duplicate.
a. Sulfite: dissolve 0.1575 g
Na2SO3 in water. Add 2 mL glycerol.
Dilute to 100 mL. Prepare fresh daily.
b. Sulfate: dissolve 0.1479 g
Na2SO4 in deionized water. Dilute to
100 mL. Stable several weeks.