Patent ID: 6479019
Filing Date: 2002-11-12
Classification: G01N

Abstract:
A sensor assembly for use in determining the presence of a target gas within a breath sample comprising:a sensor body having a chamber disposed therein, the chamber extending between body portions that are optically transparent, the chamber being in gas flow communication with a passage for passing a collected breath sample therethrough; a sensor material disposed within the chamber, the sensor material being reactive with a target gas in a collected breath sample to produce a change in sensor optical properties, the sensor material comprising one or more ingredients selected from each of the following groups consisting of: Group 1: sodium hydroxide, potassium hydroxide, sodium carbonate, and mixtures thereof; Group 2: alcohols, dimethyl sulfoxide, tetrahydrofuran, dimethyl formamide, chloroform, and mixtures thereof; and Group 3: salicylaldehyde and its derivatives, vanilla and its derivatives, benzaldehyde and its derivatives, and mixtures thereof.