Abstract
Blood tests are described, and it is noted how volatile substances in liquid biological samples frequently require preliminary separation procedures preceding gas chromatographic analysis. Equilibration of liquid with the gas phase outside the gas chromatograph, fractional distillation, solvent extraction, or water-retaining precolumns have been used to overcome these difficulties with variable success. This article describes an exchangeable cartridge in the column entrance permitting direct on-column injection of biological samples. The exchangeable cartridge design facilities continuous operation and easy cleaning. This makes it practical to have small interior cartridge dimensions, which facilitate uniform heating of the injecting needle, minimal dilution of the sample by carrier gas, and rapid charring and retention of organic material. The results of the study are discussed.
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 call
