Integration of cryogenic trap to gas chromatography-sulfur chemiluminescent detection for online analysis of hydrogen gas for volatile sulfur compounds

Ultrasensitive Online NO Sensor Based on a Distributed Parallel Self-Regulating Neural Network and Ultraviolet Differential Optical Absorption Spectroscopy for Exhaled Breath Diagnosis

“…Currently, the common detection methods for gas contain chemical methods and spectroscopic methods. Chemical methods include electrochemical sensors, − chemiluminescent detectors (CLD), − gas chromatography (GC), − and chemiresistive gas sensors. − Among these, the electrochemical sensor is susceptible to other substances in exhaled breath (EB) with a short service life and high maintenance costs. While the CLD is highly sensitive to trace NO gas, it usually requires the use of excessive amounts of a toxic reagent (O 3 ), thereby causing frequent maintenance and calibration.…”