| Use: | Separation of polynuclear aromatic compounds. |
Description:
Thin-layer chromatography consists of a stationary phase immobilized on a glass or plastic plate and a solvent. The sample, either liquid or dissolved in a volatile solvent (n-butanol and cellulose acetate), is deposited as a spot on the stationary phase. The constituents of a sample can be identified by simultaneously running standards with the unknown. One edge of the plate is then placed in a solvent reservoir and the solvent moves up the plate by capillary action. When the solvent front reaches the other edge of the stationary phase, the plate is removed from the solvent reservoir. The separated spots are visualized with ultraviolet light or by placing the plate in iodine vapor. The different components in the mixture move up the plate at different rates due to differences in their partitioning behavior between the mobile liquid phase and the stationary phase.
Analytes:
2. Non-Halogenated SVOCs
Media:
| Soil/Sediment | Water | Gas/Air |
| Requires extraction to liquid phase | BETTER | Not Applicable |
| Selectivity: | Technique measures the contaminant indirectly. |
| Susceptibility to Interference: | Medium. |
| Detection Limits : | 100-1000 ppb (soil); 1-50 ppb (water). |
| Turnaround Time per Sample: | Hours. |
Applicable To:
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Limitations:
ASTM Standards/EPA Methods:
No applicable ASTM standards or EPA methods are cited for this technology.
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