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Bad %RSD
Posted: Mon Oct 29, 2007 3:32 pm
by ym3142
I made a solution of 0.5mg/mL trimethylpropanediamine in 1 N NaOH and injected it directly to Agilent GC system. The %RSD area I got is 40%. The column is RTX 5 amine 30x0.53x1.
Any suggestions for troubleshooting. Thanks in advance
Posted: Mon Oct 29, 2007 3:45 pm
by WK
YM3142,
Your 1N NaOH is aqueous?
WK
Thanks for asking
Posted: Mon Oct 29, 2007 4:10 pm
by ym3142
Yes. it is Aqueous 1N NaOH
Posted: Mon Oct 29, 2007 4:17 pm
by chromatographer1
Extract your aqueous solution into hexane or some other non-polar solvent and try it again.
Please don't shoot water and especially 1N NaOH on any GC column unless it is a Chromosorb 103 porous polymer or 10% Apiezon L with 1% KOH on Supelcoport in Glass.
best wishes,
Rod