Introduction Ssajuari‐ssuk and sajabal‐ssuk have many clinical benefits. It is difficult to discriminate between these two species based on general characteristics aside from the shapes of the leaves. Thus, species identification and quality control between ssajuari‐ssuk and sajabal‐ssuk are of great concern in plant science and clinical therapy. Objective The aim of this study is to determine whether fast gas chromatography with uncoated surface acoustic wave sensor (GC‐SAW) can be a useful technique for performing species identification and quality control using volatile patterns of ssajuari‐ssuk and sajabal‐ssuk air‐dried for 4 months and 2 years and 4 months. Methodology Fast GC‐SAW sensor provides second unit analysis, simple, on‐line measurements that do not require pretreatment of the sample and rapid sensory information. Headspace solid‐phase microextraction gas chromatography–mass spectrometry (HS‐SPME‐GC–MS) was employed to confirm the identification of the volatiles and compared to fast GC‐SAW sensor. Results In air‐dried sajabal‐ssuk, the concentration of 1,8‐cineole was higher than that in air‐dried ssajuari‐ssuk, while the level of α‐thujone was considerably lower than that of air‐dried ssajuari‐ssuk. Each of ssajuari‐ssuk and sajabal‐ssuk air‐dried for 4 months and 2 years and 4 months has its own characteristic volatile pattern owing to its individual chemotypes or chemical compositions. Conclusion Consequently, the fast GC‐SAW sensor can be a useful technique for species identification and quality control using volatile patterns of ssajuari‐ssuk and sajabal‐ssuk air‐dried for 4 months and 2 years and 4 months. This method can be used for the standardisation of quality control using volatile patterns of herbal medicines. Consequently, the fast GC/SAW sensor can be considered a useful analytical method for species identification and quality control using the volatile patterns of ssajuari‐ssuk and sajabal‐ssuk that were air‐dried for 4 months (the first year) and 2 years and 4 months (the third year).