The detection and measurement of gas concentrations using the characteristic optical
absorption of the gas species is important for both understanding and monitoring a variety of …

The vast majority of gaseous chemical substances exhibit fundamental rovibrational
absorption bands in the mid-infrared spectral region (2.5–25 μm), and the absorption of light …

Hydrogen cyanide (HCN) is a toxic industrial chemical, necessitating low-level detection
capabilities for safety and environmental monitoring. This study introduces a novel approach …

Reducing ammonia emissions is one of the most difficult challenges for environmental
regulators around the world. About 90% of ammonia in the atmosphere comes from …

Update based on the original article by Frans JM Harren, Gina Cotti, Jos Oomens, Sacco te
Lintel Hekkert, Encyclopedia of Analytical Chemistry,© 2000, John Wiley & Sons, Ltd. time …

Gas concentration monitoring by photoacoustic spectroscopy is reviewed from the point of
view of practical applicability. Major challenges, which stem from the complexity of the …

Analogous to most new methods in science, photoacoustic spectroscopy (PAS) grew out of
an advance in technology, in this case the dramatic improvement in novel light sources …

Non-contact quartz-enhanced photoacoustic spectroscopy (NC-QEPAS) was proposed and
developed for trace gas analysis. The NC-QEPAS aims at solving the problem that the …

A high-sensitivity photoacoustic (PA) spectroscopy (PAS) system is proposed for dual
enhancement from both PA signal excitation and detection by employing a miniaturized …

Laser absorption spectroscopy as a powerful tool for detecting trace gases has been widely
used in the monitoring of atmospheric greenhouse gases, pollutions, and respiration …