The connection of a quantum spectral fingerprint to molecular structure makes spectroscopy ideal for chemical detection. Even with the broad utility of chromatography and mass spectrometry, there is still a rigor to expand the applicability of high resolution spectroscopy by miniaturizing FT-NMR and enhancing the performance of mid-IR techniques. While IR instrumentation experts have been incorporating the latest diode lasers, molecular rotational resonance (MRR) spectroscopists have designed a digital, solid-state approach to reach subTerahertz (millimeter/submillimeter-wave) molecular spectroscopy from the radio regime. Recent innovations for FT-MRR techniques have finally brought millimeter-wave spectroscopy into the modern age. FT-MRR spectroscopy is applied here to gas analyses, air analysis, and headspace analysis for sensitive, chemically specific detection of VOCs without the need for lasers, chemometrics, or chromatography.