Pre-slit autosampler septa are specialized consumables. They are used in analytical instruments like gas or liquid chromatographs equipped with autosamplers.
These septa are designed with a pre-cut slit, typically in the center. This serves as a pathway for the autosampler needle to access the vial’s contents.
Unlike standard septa, this pre-slit feature reduces the force required for needle penetration. This minimizes the risk of needle bending or damage.
The pre-slit feature also enhances sample integrity by reducing the likelihood of septa coring, where small fragments break off and contaminate the sample.
It ensures consistent resealing after the needle withdraws, maintaining a reliable seal to prevent evaporation or contamination over multiple injections.
Pre-slit septa are made from silicone for chemical resistance combined with durability. These silicone septa are compatible with a wide range of solvents, acids, and bases, making them ideal for high-throughput applications in fields such as pharmaceuticals, environmental testing, and food analysis.
Often, pre-slit autosampler septa are used in situations where minimal needle stress, increased instrument reliability, and consistent performance are critical. Their design optimizes analytical workflows, improves equipment longevity, and ensures accurate, reproducible results.
