Method Overview

• Non-Isokinetic Constant Rate Sampling;
• Sulfur Dioxide is Removed in a Buffer Solution Impinger Prior to Oxidation Stage of Sampling Train.
• Reduced Sulfur Compounds are Oxidized to Sulfur Dioxide (SO₂) and Caught in Hydrogen Peroxide Absorption Solution.
• Titrimetric Analysis

Target Compounds

• Reduced Sulfur Compounds

Performance Tips

• Charge Teflon impingers with Buffer Solution;
• Charge first two collection impingers (1 & 2) with 15 mL 3% H₂O₂ each;
• Third impinger should remain empty;
• Charge fourth impinger with silica gel.
• Separation of Analytes:
  • Sulfur Dioxides (SO₂) are soluble and collected in the buffer solution;
  • Reduced sulfur compounds will pass through this impinger and be collected in the hydrogen peroxide absorbing solution.
• Please provide high volume blanks when low concentrations are expected such as in the Acid mist and/or sulfur trioxide (SO₃) fraction.

Shipping

• Samples may be shipped at ambient temperatures.
• Be sure to include a chain of custody for each shipping container.

Applications

• Emissions measurements of reduced sulfur compounds, typically at Kraft paper mills

Accreditation

• No, please contact us if you are interested!