1. Ammonium hydroxide solution, 25%.
2. Hydrogen peroxide, 30%.*
3. Sodium hydroxide, 50% (w/v).*
4. Extraction soln: 0.2 M NH4OH.
5. Eluent: 40 m M NaOH. Dilute 4.16 mL of 50%
NaOH to 2 L with deionized water (degassed).
6. Suppressor regenerant: 0.025 N H2SO4
. Dilute
1.4 mL concentrated H 2SO4
to 2 L with
deionized water.*
7. Calibration Stock solution: 1 mg/mL (as
anion). Dissolve 0.1814 g K 2SO4
in 100 mL
deionized water.
8. H2S, calibration gas mixture, or permeation
device.
* See Special Precautions