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Hydrogen : Safety Issues
Need to make sure there is no accumulation of H2 possible in the oven..
• Use of Hydrogen generators: limited amount of hydrogen
• Hydrogen Flow restriction to set with GC inlet (electronic flow
setting)
• Hydrogen detection systems (sniffer)
Hydrogen is combustible over a concentration range of 4% to 74% by volume;
Diffusion VERY fast;
Rtx-DHA Columns for Other ASTM
Methods
For ASTM D6733
: Rtx-DHA-50 50m x 0.25mm, df = 0.5 µm
For ASTM D6729
: Rtx-DHA-100 100m x 0.25mm, df = 0.5 µm
For ASTM D5501
: Rtx-DHA-150 150m x 0.25mm, df = 1.0 µm
NOTE:
This column was called earlier Rtx-1 PONA, which is a WRONG
name as the application is DHA, not PONA.
Competing products are still called: HP-PONA, DB-PONA, CP-Sil PONA
CB, BP-1PONA and Petrocol
Biggest Challenges for customers
running ASTM D6730
Have good peak shape for alcohols…………….
Have sufficient theoretical plates ………………...
Coupling of “tuning” capillary ……………….........
Analysis time too long, wish for faster methods ..
Reproducibility of column quality parameters …..
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