Method NCASI 98.01

Chilled Impinger Method for Use at Wood Products Mills to Measure Formaldehyde, Methanol, and Phenol

This method is for the collection and analysis of formaldehyde, methanol, and phenol from stationary source emissions at wood products mills or panel plants.  The samples are collected in two chilled midget impingers and analyzed by GC/FID (flame ionization detector).

Use of this method requires the knowledge of US-EPA Methods 1-4.  The sampling train consists of a heated probe and filter containing a glass fiber or Teflon filter.  Two impingers connected in series are filled with 15mL of deionized water.  If the source has a high amount of moisture (> 40%) an empty impinger can be added prior to the water impingers to serve as a water dropout.  After sample collection, the contents of the impingers are combined into a single bottle and stored at 4°C for shipment to the lab for analysis.




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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   The method says that all the analytes were stable for 28 days if kept at 4°C.
Preservatives:   Store samples at 4°C.
Required Preps:   Glass or polyethylene bottle
Collection Method:   NCASI 98.01
Analytical Methodology:   GC/FID
Documentation:   98.01

Analyte List*

Analyte Formula CAS Number Detection Limit

* 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.