Headspace analysis with cryogenic focusing: a procedure for increasing the sensitivity of automated capillary headspace analysis

摘要: A convenient procedure has been described for enhancing the sensitivity of equilibrium headspace gas chromatography. The technique involves cryogenic focusing vapors at head a 0.32 mm fusedsilica capillary column which coupled to packed injection port. Cryofocusing is accomplished automatically by cooling GC oven and results in enhanced with improved resolution. With this simple no sample splitting required gives least 10-fold increase sensitivity. Multiple Headspace Injection (MHI) allows several rapid injections be made start single chromatographic run. causes superimposed, thus increasing even further. These procedures have demonstrated flavor aroma analyses toothpaste soft drink samples.