The technique is generally free of interferences for compounds containing only carbon, hydrogen, nitrogen, oxygen, sulphur, chlorine, bromine or iodine.
- Fluorine interferes significantly due to its ability to liberate oxygen from the glass components in the system.
- Alkaline metals, alkaline earths, lanthanide and actinide series, silicon and other elements that form thermally stable oxides not reduced by carbon can induce significant errors.
- Phosphorus compounds can poison the carbon catalyst sufficiently to passivate its performance.
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