Autosampler probe reduces blockage risk and improves sample flow stability in ICP systems

Glass Expansion introduces the Guardian™ Autosampler Probe, a sample introduction component for ICP-OES and ICP-MS autosampler systems designed to improve flow stability, reduce blockage events, and limit cross-contamination during routine analysis.

The probe uses a cone-shaped ceramic tip incorporating a microhole-based protective geometry. These openings are not designed as a conventional filter with a fixed pore size, but act as a physical barrier that reduces the entry of larger particulates while maintaining continuous sample flow. This approach supports stable uptake performance across aqueous, organic, and higher-viscosity matrices.

Standard PTFE-sheathed carbon fibre probes typically integrate the sample line within the probe body, meaning that a blockage in the line often requires full probe replacement. The Guardian Probe separates the sample line using interchangeable UniFit™ tubing, allowing the line to be replaced independently if a blockage occurs, reducing downtime and simplifying maintenance.

Controlled wetting behaviour at the ceramic tip reduces droplet formation and helps minimise cross-contamination between samples, particularly in high-to-low concentration sequences. This supports more consistent analytical performance in automated workflows. The Guardian™ Probe is designed for direct installation on major ICP autosampler platforms, including Cetac, Agilent®, PerkinElmer®, Shimadzu®, Aim Lab, and Thermo Fisher Scientific™. 

Please see the Glass Expansion catalogue online.