| abstract |
Methods and systems for conditioning a gas sample for analysis and measuring, detecting, and/or determining the concentration of at least one analyte in a gas sample. Methods include a combination and/or repetition of dehumidifying and/or humidifying the gas, and/or performing a chemical reaction an analyte, and measuring, detecting, and/or determining the concentration of an analyte or an output analyte resulting from the chemical reaction. Systems to adjust the humidity of a gas sample and/or perform a chemical reaction on an analyte, and measure, detect, and/or determine the concentration of an analyte or an output analyte resulting from the chemical reaction comprise cartridges, capsules, test strips or test strip chambers and one or more sensors. Systems may further comprise a humidity exchange material to further adjust the humidity. Gas samples include exhaled breath. Analytes include nitric oxide. Output analytes include nitrogen dioxide. |