https://doi.org/10.1351/goldbook.E01981
A small . The linear dynamic range may be but the maximum measuring value generally lies below .
radioactive source
containing 3H or 63Ni ionizes the molecules of the carrier gas
(nitrogen or argon–methane), and a potential difference creates a small current. This current is reduced when an electronegative substance (such as a halocarbon) is introduced. The reduction in current is a measure of the concentration of the electronegative substance. The detection limit
(threshold) varies greatly according to the substances to be analysed and can reach a mixing ratio of