Retention gaps, phenylmethyl silylated, low–medium polar
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The retention gap technique in combination with on-column injection allows concentration of a large sample volume in the capillary column. Retention gaps consist of uncoated (no stationary phase), deactivated fused silica capillary tubing. A retention gap must be inert without any noticeable retention (analytes are not retained). Phenylmethyl (low-medium polar) deactivated tubing as an additional choice of surface deactivation. Improve peak shape by focusing and concentration of the sample components when introducing a large sample volume onto the column.
| Capillary inner diameter | 0.25 mm, 0.32 mm, 0.53 mm |
|---|---|
| Capillary length | 10 m, 25 m |
| Capillary outer diameter | 0.4 mm (0.25 mm ID) - 0.5 mm (0.32 mm ID) - 0.8 mm (0.53 mm ID) |
| Deactivation | Phenylmethyl silylated, low–medium polar |
| Hazardous material | No |
| Method | Gas chromatography (GC), accessories |
| Polarity | Low–medium polar |
| Recommended application(s) | Improve peak shape by focusing and concentration of the sample components when introducing a large sample volume onto the column |
| Storage temperature | 15–25 °C / 59–77 °F |
| Suitable solvents | Many solvents, nonpolar and mid-polar, but not with methanol and water |
| Temperature stability (max) | 320 °C |
| Type | Retention gap |