Application and Exploration of Fast Gas Chromatography - Surface Acoustic Wave Sensor to the Analysis of Thymus Species

摘要: Abstract Fast gas chromatography combined with surface acoustic wave sensor (GC/SAW) has been applied for the detection of volatile aroma compounds emanated from thymus medicinal plants such as T. quinquecostotus (Jeju and Mt. Gaya in South Korea), var. japonica (Ulreung island mongolicus (Northeastern Asia), serpyllum (Europe). The GC/SAW involving fragrance pattern analysis provides a novel analytical method very fast separation characterization aromas caused by delicate difference chemical composition according to botanical geographical origin. On comparison experiments, characteristic components tendency air-dried species detected appear be quite similar those obtained headspace solid-phase microextraction (HS-SPME)-GC–MS, but abundance ratios between these two methods are different. In addition that, discrimination various using VaporPrint image based on reliable result. basis principal component (PCA) results, ability classification among completely different chemotypes HS-SPME-GC–MS is good enough, same which origin country, original its variety, an air-drying term 13 days 16 months much lower than GC/SAW. Interestingly, present experiment reveals that influences composition: concentration pharmacologically active species, monoterpene phenol (thymol), reaches highest concentrations after it was dried 5 or days, higher fresh over-dried long times.