Method ID-172

Carbon Dioxide in Workplace Atmospheres


This method is for the collection and analysis of carbon dioxide in workplace air.  The sample is collected into a gas sampling bag.  After collection, the sample is analyzed by GC/TCD (thermal conductivity detector).

When shipping the sampling bag, make sure to fill the bag no more than half full to allow for the gas to expand during loss of pressurization during flight.  Otherwise, the bags may burst during travel.


(OSHA)

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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   The method says 14 days from sample collection to analysis but to analyze the samples as soon as possible.
Preservatives:   None specified by the method.
Required Preps:   Tedlar or equivalent sampling bag
Collection Method:   The method recommends a 0.01 - 0.05 L/min. flow rate with a 2 - 5L sample collection volume.
Analytical Methodology:   GC/TCD
Documentation:   ID-172

Analyte List*

Analyte Formula CAS Number Detection Limit
Carbon dioxide
CO2
124-38-9
500
 ppm

* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.