An innovative spectroscopic technique based on balancing and cancellation of modulated signals induced by two excitation sources is reported. For its practical implementation, we used quartz-enhanced photoacoustic spectroscopy as an absorption-sensing technique and applied the new approach to measure small temperature differences between two gas samples. The achieved sensitivity was 30 mK in 17 s. A theoretical sensitivity analysis is presented, and the applicability of this method to isotopic measurements is discussed.
No takes yet. Share an insight, caveat, or question.
Spagnolo et al. (2011) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: