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Packed column inlet as a direct injection capillary inlet

Rafał Wawrzyniak

Department of Analytical Chemistry, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60 780 Poznań, Poland



Received: 25 July 2007

Abstract: Discrimination is a known problem when analyzing high-boiling compounds, which considerably hinders their analysis at trace levels. This problem can be solved by using either direct or on-column injection. Modification of a standard injection port liner and a micro-syringe is presented, so that a direct injection with in-column evaporation can be easily done. The proposed changes are compatible with any packed column injection port, simple to implement, and inexpensive. The changes are described and the analysis of acyloglycerols in diesel oil spiked with 50 % FAME is used to demonstrate the utility of the proposed injection technique.

Keywords: direct injection - on-column injection - sample injector modification - capillary columns

Full paper is available at

DOI: 10.2478/s11696-008-0030-2


Chemical Papers 62 (3) 323–325 (2008)

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