A new column system for isothermal gas chromatographic analysis of light gases (H2, O2, N2, CO, CH4, CO2, C2H4, C2H6 and C2H2) employing a column switch technique
Tóm tắt
A new column system for the isothermal analysis of H2, O2, N2, CO, CH4, CO2, C2H4, C2H6 and C2H2 is described. Higher hydrocarbons and water are backflushed from the system. The use of 13X molecular sieve in a relatively deactivated state shortens the elution times of the light components and improves peak shapes. Both factors enable quantitative analyses to be carried out satisfactorily at lower concentrations than would otherwise be possible. Analysis of all compounds listed can be carried out in eleven minutes. Sparingly activated 13X molecular sieve columns have proved to be very stable and rarely require reactivation. The method of column switching employed avoids the use of mechanical valves in the sample path and is suitable for automatic operation.
Tài liệu tham khảo
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