REAGENTS:
1. Sodium thiosulfate, reagent grade.
2. Water, deionized.
3. Extraction solution: 6 m M Na2S2O3. Dissolve
0.474 g Na 2S2O3 in 500 mL deionized water.
4. Eluent: 0.25 mM NaHCO3/4 mM
Na2CO3/0.78 mM p-cyanophenol. Dissolve
0.041 g NaHCO 3, 0.848 g Na 2CO3 and
0.186 g p-cyanophenol in 2 L filtered
deionized water.
5. Suppressor regenerant, 0.025 N H2SO4.
Dilute 2.8 mL conc. H 2SO4 to 4 L with
deionized water.*
6. Calibration stock solutions, 1 mg/mL (as
anion).
(1) Dissolve 0.149 g KBr in 100 mL
deionized water
(2) Dissolve 0.21 g KCl in 100 mL deionized
water.