This review article introduces the significance of testing of volatile organic compounds
(VOCs) in clinical samples and summarizes important features of some of the technologies …

Breath-based metabolomics (breathomics) is an exciting developing area of biotechnology
that centers on the capture, identification, and quantification of volatile organic compound …

Detection and analysis of volatile compounds in exhaled breath represents an attractive tool
for monitoring the metabolic status of a patient and disease diagnosis, since it is non …

Cantilevers in microelectromechanical systems have the advantages of non-labeling, real-
time detection, positioning, and specificity. Rectangular solid, rectangular hollow, and …

High precision and fast measurement of gas concentrations is important for both
understanding and monitoring various phenomena, from industrial and environmental to …

Laser absorption spectroscopy combined with spectral analysis has been extensively
investigated in detection and measurements of gas samples because of their broad …

Asthma is the most common chronic disease in children, and is characterized by airway
inflammation, bronchial hyperresponsiveness, and airflow obstruction. Asthma diagnosis …

We present an all-optical photoacoustic (PA) multigas analyzer by using a digital fiber-optic
acoustic detector, which consists of a spectrum demodulation based fiber Fabry-Perot (FP) …

Infrared laser absorption spectroscopy (LAS) is a promising modern technique for sensing
trace gases with high sensitivity, selectivity, and high time resolution. Mid-infrared quantum …

The ammonia odor from the exhaled breath of renal patients is associated with high levels of
blood urea nitrogen. Typically, in the liver, ammonia and ammonium ions are converted into …