A New Cryogenless TO15 Canister Preconcentrator with Reduced System Carrier-Over When Exposed to Higher Concentration Samples

摘要

A cryogen free TO15 solution has been demonstrated with superior water management and greater immunity to contamination when accidently running high concentration samples. The ability to clean up a system quickly after exposure to high concentration samples can save laboratories a substantial amount of time, reducing the need for long system bake-outs, trap replacements, and sample re-runs. This means higher productivity and sample throughput for these laboratories to help them to meet customer demands, while achieving their own financial goals. Even lower carryover can be achieved by eliminating rotary stream select valves found in most commercial canister autosamplers. The 7650-M robotic autosampler makes only momentary contact with the sample using a transfer line completely heated up to 150c, and then immediately flushes the exposed line to eliminate any residual that would otherwise absorb into surfaces and rotors in classical rotary valve based autosamplers.