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Vial Inserts
Micro inserts and spring-bottom inserts for low-volume sample analysis. Reduce dead volume in standard 2 mL autosampler vials to as little as 100 µL for precious samples.
100–300 µL
Insert Volumes
Glass & Poly
Materials
9mm, Polyspring Inserts, 0.25mL, 100/unit
SKU: VJP-09-0002
Crimp Top, 11mm, Clear Insert Vials, No Patch, 0.25mL, 100/unit
SKU: VCE-11-0002
Screw Top, 9-425, Amber Insert Vials, No Patch, 0.25mL, 100/unit
SKU: VAE-09-0002
Screw Top, 9-425, Amber Insert Vials, Patch, 0.25mL, 100/unit
SKU: VAE-09-1002
Screw Top, 9-425, Clear Insert Vials, No Patch, 0.25mL, 100/unit
SKU: VLE-09-0002
Screw Top, 9-425, Clear Insert Vials, Patch, 0.25mL, 100/unit
SKU: VLE-09-1002
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When to Use Vial Inserts
Vial inserts sit inside a standard 2 mL autosampler vial to reduce the working volume. This allows your autosampler needle to reach the bottom of a small sample without switching to a dedicated micro-vial format. Use inserts when you have limited sample volume (100–500 µL) but want to maintain compatibility with your existing 9-425 vial trays and caps.
💡Insert Selection
Flat-bottom inserts work well when the autosampler needle reaches the bottom of the insert. Conical (tapered) inserts are preferred for maximum sample recovery because the conical shape funnels the last drops to the needle tip. Spring-bottom inserts use a built-in spring to keep the insert centered in the vial, preventing tipping during autosampler operation.
FREQUENTLY ASKED
Vial Insert FAQ
With a 150 µL conical insert, you can reliably inject from as little as 10–20 µL of sample, depending on your autosampler needle length and position. The conical geometry channels the sample to the lowest point, minimizing dead volume.
Glass inserts offer the best chemical inertness and are suitable for organic solvents and aggressive mobile phases. Polypropylene inserts are more economical, shatter-resistant, and suitable for aqueous samples. For trace analysis of active compounds, glass inserts (especially deactivated/silanized) are preferred.
Most micro inserts are designed for the standard 12 x 32 mm (2 mL) autosampler vial format. Verify the insert outer diameter (typically 5–6 mm) fits snugly inside your vial. Some inserts include a top flange or polyspring to keep them centered and stable.
Yes. Inserts are compatible with screw-cap, snap-cap, and crimp-top vials as long as the vial has the standard 12 x 32 mm body. The closure type does not affect insert fit. Just ensure the autosampler needle depth is adjusted to reach the bottom of the insert.
Working with limited sample volumes?
Let us help you select the right insert geometry and material for your autosampler and analytical method.