Gas analysis may refer to:

• Blood gas analysis, a method that measures arterial oxygen tension, carbon dioxide tension, and other aspects of a blood sample
• Breath gas analysis, a non-invasive method that measures volatile organic compounds present in the exhaled breath
• Dissolved gas analysis, a method that measures dissolved gases in insulating fluids
• Evolved gas analysis, a method that measures the gas evolved from a heated sample that undergoes decomposition or desorption
• Breathing gas analysis, especially for breathing gas mixtures
• Trace gas analysis, as an application of mass spectrometry, ion-mobility spectrometry or a combination of the two methods

Gas analyzer may refer to:

• Infrared gas analyzer
• Residual gas analyzer
• Orsat gas analyser
• Thermal and Evolved Gas Analyzer, a scientific instrument aboard the Phoenix spacecraft
• Helium analyzer, an instrument to measure the concentration of helium in a gas mixture
• Electro-galvanic oxygen sensor, a device which consumes a fuel to produce an electrical output by a chemical reaction

This disambiguation page lists articles associated with the title Gas analysis.
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