This method is for the collection and analysis of methanol, acetone, acetaldehyde, methyl ethyl ketone and formaldehyde in stationary source emissions from pulp and paper mills. The sample is collected using a midget impinger and a silica gel sorbent tube. The sample is analyzed using GC/FID (flame ionization detector).
The sampling train consists of a probe, two midget impingers, two silica gel tubes and a sampling pump. The first impinger is empty and used for moisture knockout and the second is filled with deionized water. The impingers are kept chilled during sampling. Two silica gel tubes are connected in series after the impingers. The impinger catch is analyzed by GC/FID. Each silica gel tube is desorbed with a 3% (v/v) solution of n-propanol and analyzed by GC/FID.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 10 days from sample collection to analysis for acetaldehyde and 21 days for the other analytes in the impinger catch if kept at 4°C. 10 days from sample collection to analysis for all analytes for the silica gel tubes is kept at 4°C. |
| Preservatives: | Store samples at 4°C. |
| Required Preps: | Silica gel tube, 260/1040 mg (SKC 226-22) |
| Collection Method: | Midget impinger, silica gel tube sampling train |
| Analytical Methodology: | GC/FID |
| Documentation: | 
CI/SB/PULP-94.02
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Formaldehyde | CH2O |
50-00-0 |
0.5 |
mg/L |
| Methanol | CH4O |
67-56-1 |
0.5 |
mg/L |
| Acetone | C3H6O |
67-64-1 |
0.5 |
mg/L |
| Acetaldehyde | C2H4O |
75-07-0 |
0.5 |
mg/L |
| Methyl ethyl ketone (2-Butanone) | C4H8O |
78-93-3 |
0.5 |
mg/L |
* 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.