Preparative capillary gas chromatography. II: Fraction collection on traps coated with a very thick film of immobilized stationary phase

摘要: Abstract A new concept for preparative collection of volatile compounds is described, using an open-tubular trap coated with 80-μm film a cross-linked silicone stationary phase. Breakthrough volumes number organic were calculated from their capacity factors and band broadening. The showed very high retention, as expected the low phase ratio, β = 1.44. Benzene example had factor 285 at room temperature. retention thick-film roughly comparable to in empty tube, kept temperature 802-90°C lower. Thus, it was shown be possible collect fractions eluent capillary column over extended period. Recovery collected substances carried out either by thermal desorption or extraction pentane. nearly complete yield trapped material obtained both cases. elimination need cryotrapping greatly facilitates fraction gas chromatography subsequent sample handling.