40 CFR 60.648

Determination of Hydrogen Sulfide in Acid Gases and Gas Mixtures

Applicability: This procedure applies to the determination of hydrogen sulfide in acid gases and gas mixtures received by Conti Testing Laboratories, Inc. (CTL), Pittsburgh, Pennsylvania.
1.1. Summary: The method consists of titrating hydrogen sulfide in a gas sample directly with a standard solution of iodine.
1.2. Matrix or Matrices: Acid gases and gas mixtures.
1.3. Holding Time: None.
1.4. Preservation: None.
1.5. Interferences: Tarry vapors interfere with readings. A calcium chloride tube filled with cotton and placed at the gas inlet will prevent tar from entering the burette. 1.6. Sample collection and shipment: Gas sample collection tube.

Purpose: The purpose of this procedure is to provide a method for measuring hydrogen sulfide in acid gas.