Improvement of a cryogenic preconcentration unit for C2 ‐ C6 hydrocarbons in ambient air at ppt levels
- 1 September 1986
- journal article
- research article
- Published by Wiley in Journal of High Resolution Chromatography
- Vol. 9 (9) , 502-505
- https://doi.org/10.1002/jhrc.1240090903
Abstract
A previously described method for the quantitative analysis of C2 ‐ C6 hydrocarbons in the ppt range based on cryogenic preconcentration has been improved further. Problems caused by condensation of O2 and traces of water from the sample were overcome using a modified dyring procedure and a tandem preconcentration trap. In addition, the flow path through the unit was simplified further. Technical details are given. The reproducibility of both quantitative results and retention times was improved by these modifications. Typical standard deviations were in the order of 2% at the 200 ppt level.Keywords
This publication has 1 reference indexed in Scilit:
- Analysis of light hydrocarbons (C2-C6) at PPT levels by high resolution gas chromatographyJournal of High Resolution Chromatography, 1985