US 12,130,270 B2
Humidification type highly-sensitive/highly-selective ammonia detection method and detection device using nanomechanical sensor
Gaku Imamura, Ibaraki (JP); Kosuke Minami, Ibaraki (JP); Kota Shiba, Ibaraki (JP); and Genki Yoshikawa, Ibaraki (JP)
Assigned to NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Ibaraki (JP)
Appl. No. 17/619,024
Filed by NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Ibaraki (JP)
PCT Filed May 8, 2020, PCT No. PCT/JP2020/018649
§ 371(c)(1), (2) Date Dec. 14, 2021,
PCT Pub. No. WO2020/255580, PCT Pub. Date Dec. 24, 2020.
Claims priority of application No. 2019-112434 (JP), filed on Jun. 18, 2019.
Prior Publication US 2022/0291185 A1, Sep. 15, 2022
Int. Cl. G01N 33/00 (2006.01); C08F 222/06 (2006.01); G01L 1/18 (2006.01); G01N 5/02 (2006.01); G01N 29/02 (2006.01)
CPC G01N 33/0054 (2013.01) [C08F 222/06 (2013.01); G01L 1/18 (2013.01); G01N 5/02 (2013.01); G01N 29/022 (2013.01); G01N 2291/0256 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for detecting ammonia comprising
supplying a sample gas to a nanomechanical sensor that detects a stress or a displacement using poly(methyl vinyl ether-alt-maleic anhydride) as a material of a receptor layer, the sample gas having a possibility to contain ammonia, and
detecting presence or absence of ammonia or a content of ammonia in the sample gas based on an output signal from the nanomechanical sensor,
wherein the sample gas is a humidified sample gas with controlled relative humidity, the humidified sample gas being obtained by adding water vapor to the sample gas such that the relative humidity of the sample gas is 25% or more and 50% or less.