Versatile all-glass splitless sample-introduction system for trace analysis by capillary gas chromatography

Dynamic headspace enrichment system for CGC analysis of volatiles released by plants

“…Compounds with higher vapor pressure were difficult to analyze, probably because of incomplete trapping. This observation is in agreement with previous work [15,16] stating that highly volatile organic compounds with boiling points less than 7OoC cannot be quantitatively recondensed by simple capillary cold trapping, even at liquid nitrogen temperatures. The chromatographic profiles corresponding to the olfactronic patterns of two moss species (Microlepidozia Setacea and Microlepidozia Trichoclados) are reproduced in Figure 3.…”

Dynamic headspace enrichment system for CGC analysis of volatiles released by plants

“…Compounds with higher vapor pressure were difficult to analyze, probably because of incomplete trapping. This observation is in agreement with previous work [15,16] stating that highly volatile organic compounds with boiling points less than 7OoC cannot be quantitatively recondensed by simple capillary cold trapping, even at liquid nitrogen temperatures. The chromatographic profiles corresponding to the olfactronic patterns of two moss species (Microlepidozia Setacea and Microlepidozia Trichoclados) are reproduced in Figure 3.…”

A modified inlet system for high speed gas chromatography using inert metal tubing with a carbon dioxide cooled cryotrap

“…The use of EPC also brings the benefit that smaller trap sections can be used to achieve trapping efficiency comparable to a previous report, where 20 cm or longer trap tubes were used to attain the quantitative trapping for compounds such as hexane and benzene [22]. Use of the smaller tube sections allows materials other than Cu/Ni alloy to be used as the trap tube which may have contributed to the reduced sample decomposition seen.…”

Determination of volatile compounds in water by purging directly to a capillary column with whole column cryotrapping

“…This approach has recently been incorporated into an EPA P&T capillary GC method (22). The potential disadvantage in using this trapping method is that short, open tubular zones have not, in general, been found to be 100% effective in trapping volatile analytes (13)(14)(15).…”

Dynamic headspace enrichment system for CGC analysis of volatiles released by plants

“…Compounds with higher vapor pressure were difficult to analyze, probably because of incomplete trapping. This observation is in agreement with previous work [15,16] stating that highly volatile organic compounds with boiling points less than 7OoC cannot be quantitatively recondensed by simple capillary cold trapping, even at liquid nitrogen temperatures. The chromatographic profiles corresponding to the olfactronic patterns of two moss species (Microlepidozia Setacea and Microlepidozia Trichoclados) are reproduced in Figure 3.…”

A modified inlet system for high speed gas chromatography using inert metal tubing with a carbon dioxide cooled cryotrap

“…The use of EPC also brings the benefit that smaller trap sections can be used to achieve trapping efficiency comparable to a previous report, where 20 cm or longer trap tubes were used to attain the quantitative trapping for compounds such as hexane and benzene [22]. Use of the smaller tube sections allows materials other than Cu/Ni alloy to be used as the trap tube which may have contributed to the reduced sample decomposition seen.…”

Determination of volatile compounds in water by purging directly to a capillary column with whole column cryotrapping

“…This approach has recently been incorporated into an EPA P&T capillary GC method (22). The potential disadvantage in using this trapping method is that short, open tubular zones have not, in general, been found to be 100% effective in trapping volatile analytes (13)(14)(15).…”

Dynamic headspace enrichment system for CGC analysis of volatiles released by plants

“…Compounds with higher vapor pressure were difficult to analyze, probably because of incomplete trapping. This observation is in agreement with previous work [15,16] stating that highly volatile organic compounds with boiling points less than 7OoC cannot be quantitatively recondensed by simple capillary cold trapping, even at liquid nitrogen temperatures. The chromatographic profiles corresponding to the olfactronic patterns of two moss species (Microlepidozia Setacea and Microlepidozia Trichoclados) are reproduced in Figure 3.…”

A modified inlet system for high speed gas chromatography using inert metal tubing with a carbon dioxide cooled cryotrap

“…The use of EPC also brings the benefit that smaller trap sections can be used to achieve trapping efficiency comparable to a previous report, where 20 cm or longer trap tubes were used to attain the quantitative trapping for compounds such as hexane and benzene [22]. Use of the smaller tube sections allows materials other than Cu/Ni alloy to be used as the trap tube which may have contributed to the reduced sample decomposition seen.…”

Determination of volatile compounds in water by purging directly to a capillary column with whole column cryotrapping

“…This approach has recently been incorporated into an EPA P&T capillary GC method (22). The potential disadvantage in using this trapping method is that short, open tubular zones have not, in general, been found to be 100% effective in trapping volatile analytes (13)(14)(15).…”