Laser Based, Temperature Insensitive, Carbon Dioxide Isotope Ratio Measurement

摘要

An apparatus and method (and related kit) for determination of the isotopic ratio of 13C to 12C in a gas sample containing carbon dioxide comprising introducing gas into a gas sample chamber, directing light into the sample chamber from a laser light source, the laser light source being capable of accessing one or more of the wavelength pairs 2054.37 and 2052.42; 2054.96 and 2051.67; or 2760.53 and 2760.08 nanometers, and with a detector detecting the laser light energy after passage through the sample chamber.

主权项

1. A method for determination of the isotopic ratio of 13C to 12C in a gas sample containing carbon dioxide, the method comprising the steps of:
introducing the gas sample into a gas sample chamber; directing laser light into the sample chamber from a laser light source, the laser light being in part absorbed by one or more of the carbon dioxide absorption line pairs designated by the wavelength pairs 2054.37 and 2052.42; 2054.96 and 2051.67; and 2760.53 and 2760.08 nanometers; and with one or more detectors, detecting the remaining laser light after passage through the sample chamber and determining an amount of absorption by the one or more carbon dioxide absorption line pairs.