Laboratory Services

Isokinetic sampling train
Filter separates particulate sulfates from gaseous sulfates
- Typically, only the gaseous sulfates are quantified
Analyses by Barium Chloride Titration.

Probe liner should be pre-rinsed with DI Water and then with isopropanol (to dry water);
Hot Condensor should be rinsed with DI Water after each test run (then with isopropanol to dry water);
Charge the first two impingers with 100 mLs of 3% H₂O₂ each
Charge the last impinger with 300 g silica gel.
Filter holder must be teflon;
Separation of Analytes:
- Sulfuric acid mist should be vaporized in the hot filter/probe and be collected in the hot condensor;
- Sulfur trioxide should condense and be caught in the hot condensor;
- Sulfur dioxide should be absorbed in the peroxide absorbing solution;
If high moisture content is expected, an optional pre-impinger can be inserted prior to the first two. This impinger should be charged with 50 mL of 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.

This method was originally designed for sulfuric acid plant exhausts (dry gas stream);
- Sulfuric Acid Mist Emissions;
- Sulfur Trioxide Emissions; and
- Sulfur Dioxide Emissions.
Difficulties can be experienced in adaptations to coal-fired power plants (contact us for further information).