This is for the determination of various types of hydrocarbon mixtures called naphthas which are used in paints and varnishes and as general purpose solvents. The sample is collected on a charcoal tube, desorbed with carbon disulfide, and analyzed by GC/FID (flame ionization detector). Most naphthas are complex and the components elute over a wide temperature range making interferences from other substances possible.
The working range is 100 to 2000 mg/m³ for a 5 L air sample.
NOTE: This method combines and replaces Methods S86, S380, and S382.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | The method states at least 1 week from sampling to analysis if kept at 25°C. |
| Preservatives: | Store at 25°C. |
| Required Preps: | Charcoal tube 100 mg/50 mg (SKC 226-01) |
| Collection Method: | The method recommends a flow rate of 0.01 - 0.2 L/min. and a collection volume of 1.3 - 20L. |
| Analytical Methodology: | GC/FID |
| Documentation: | 
1550
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Petroleum distillates (naphtha) | 8002-05-9 |
0.5 |
mg | |
| Kerosene | 8008-20-6 |
0.5 |
mg | |
| Naphtha (coal tar) | 8030-30-6 |
0.5 |
mg | |
| VM & P Naphtha | 8032-32-4 |
0.5 |
mg | |
| Stoddard solvent | 8052-41-3 |
0.5 |
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.