Using Concurrent Solvent Recondensation - Large Volume Splitless Injection (CSR-LVSI) to Perform Trace Analysis of Non Targeted Emerging Contaminants

Oral Presentation

Prepared by C. Rattray, J. Cochran
Restek, 110 Benner Circle, Bellefonte, PA, 16823, United States


Contact Information: chris.rattray@restek.com; 814-353-1300


ABSTRACT

When combined with cartridge solid phase extraction or a micro-extraction method, CSR-LVSI provides one of the only means of detecting non targeted trace level volatile contaminants with a response high enough to allow for tentative identification using the NIST spectral library. Typical large volume injection techniques use solvent venting programmable temperature vaporization inlets to concentrate semivolatile extracts in the GC inlet before transferring the sample to the analytical column. This is not possible for volatile analytes because the vapor pressures for the solvent and compounds of interest are too similar, resulting in the loss on volatile compounds during the solvent venting process. This presentation will demonstrate how volumes up to 250 ÁL can be injected in an unmodified GC inlet for screening source and finished drinking waters for non targeted emerging contaminants.