Agilent Screw Caps
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All pictures shown are for illustration purpose only. Actual product may vary.
Screw Caps from Agilent
Agilent Technologies screw caps are available in a range of different sizes and different septa type to suit all your application needs.
- 8 mm screw caps for the original, smaller opening vials with an 8-425 thread-size
- 9 mm screw caps for wide opening vials (40% larger opening than standard opening vials)
- 13 mm screw caps for 4 mL vials
- 16 mm screw caps for 6 mL vials
Choose certified caps for full warranted compatibility with Agilent autosamplers.
Agilent screw caps are 9 mm and come with precision fit septa to provide a consistently secure seal when paired with Agilent screw vials. They are available in different colours and with a wide range of septa material to suit different application needs.
Features
- Agilent septa are continually being improved to limit leaching, coring, sticking, push-through, hardness, and adsorption/absorption
- During manufacture, Agilent septa undergo thermal and chemical conditioning to reduce siloxane bleed, which can occur when the septa material is stressed during heating, solvent interaction, or piercing by the autosampler needle
- For highly sensitive samples, we recommend PTFE-lined (“sandwiched”) septa, because the PTFE layers act as a chemically resistant barrier
Specifications
Use the chart below to determine the right cap and septa combination, based on your application.
| PTFE/Silicone* | PTFE/Silicone/PTFE* | PTFE/Red Rubber | |
| Temperature Range | -40 - 200°C | -40 - 200°C | -40 - 90°C |
| Use for multiple injections | Yes | Yes | No |
| Price | Economical | Most expensive | Very economical |
| Resistance to coring | Excellent | Excellent | None |
| Recommended for storage | Yes | Yes | No |
| Best for | Most common HPLC and GC analyses, not as resistant to coring as P/S/P | Superior performance for ultra analysis, repeat injections, internal standards | Chlorosilanes, more economical option for single injections |
*Agilent silicone is peroxide cured, making it more inertand less likely to interact with samples
Literature
Your essential resource for autosampler vial selection
Overview of Agilent's vials and sample containment solutions
Technical overview of Agilent septa
Agilent easy grip magnetic 9 mm screw caps for PAL3 autosamplers