Laboratory Services

Charge first collection impingers with 15 mL 80% Isopropanol;
Charge next two collection impingers (2 & 3) with 15 mL 3% H₂O₂ each;
Fourth impinger should remain empty;
Charge fifth impinger with silica gel.
Separation of Analytes:
- Acid mist and/or sulfur trioxide (SO₃) are soluble and collected in the Isopropanol (IPA) solution;
- Sulfur Dioxide is insoluble in the IPA solution. It will pass through this impinger and be collected in thehydrogen peroxide absorbing solution.
If water droplets are expected, large impingers along with EPA Method 8 should be used.
If high moisture content is expected, an optional pre-impinger can be inserted prior to the first two. This impinger should be charged with 15 mL of the 0.1 N H₂O₂ absorbing solution.
Please provide high volume blanks when low concentrations are expected such as in the Acid mist and/or sulfur trioxide (SO₃) fraction.

The isopropanol fraction may be a hazardous good (flammable) for shipping purposes. Please call for IATA codes if you need them.
Samples may be shipped at ambient temperatures.
Be sure to include a chain of custody for each shipping container.

Emissions measurements of sulfur dioxide
We've even used this method on suflur burners (upwards of 8% SO₂ in the gas stream).