The technique involved the use of a capillary Molecular Sieve column in combination with a Micro Thermal Conductivity Detector. This system is very sensitive with high resolutions. The analytical time is reduced to approximately 2 minutes. This amounts to a reduction of the analytical time by a factor of two to four in comparison with methods described by others. In addition to a rapid analysis, it is also possible to reduce the liberation time of 40 minutes. Using sulfuric acid as the liberating agent, a gradual and reproducible release of carbon monoxide was seen. This approach shortens the time required in emergency cases to prepare a sample. Figures and 5 references (Author abstract modified)