This method is used for the determination of n-butylamine. The sample is collected on sulfuric acid-treated silica gel tubes, desorbed in 50% methyl hydroxide and neutralized with potassium hydroxide, analyzed by GC/FID. The working range is 0.7 to 144 ppm (2 to 430 mg/m ³) for a 15 L air sample. The method states use of a nitrogen-specific detector instead of FID will greatly increase sensitivity. This alternate detector has been used for amines with a 30-m x 0.25mm x 0.25 µm film DB-5 fused silica capillary column with a liner packed with potassium hydroxide- coated glass wool. In sampling atmospheres above 60% relative humidity, the sorbent tube may have lowered capacity since both concentrated sulfuric acid and silica gel are dessicants. NOTE: This method revises Method S138. Method 2010 for aliphatic amines may also be used for the determination of n-butylamine.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | At least 7 days from sampling to analysis if kept at 25°C |
| Preservatives: | Store at 25°C. |
| Required Preps: | Solid sorbent tube: sulfuric acid-treated silica gel, 150 mg/75 mg |
| Collection Method: | Solid sorbent tube: 2 - 100 L @ 0.01 - 1 L/min. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
2012
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| n-Butylamine | C4H11N |
109-73-9 |
0.012 |
mg |
* 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.