Abstract
The reconcentration of bands broadened in space by the use of retention gaps depends on the ratio of the retention powers in the retention gap and the separation column. The reconcentration is more efficient than necessary if uncoated column inlets with lengths of a few metres and diameters not far exceeding that of the separation column are used. However, if large retention gaps are applied for on-column injections of large sample volumes or for direct coupling of high-performance liquid chromatography with capillary gas chromatography, the retention power, i.e., the film thickness of the stationary phase in the separation column, may need to be increased in order to provide a sufficient reconcentration effect. An equation is presented that allows the calculation of the required film thickness for given geometries of the retention gap and the separation column, the retention power in the retention gap and a given tolerance to peak broadening.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
