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- Posts: 543
- Joined: Thu May 18, 2006 2:36 pm
- Location: UK
"The only follow up I have for this is... The Restek tech person said this column is designed for pH 5 - 9. Would it be a problem to run my samples at pH 2 -3? "
Stabilwax-DA is a cross bonded phase, however, I would go with the experience and advice of the Restek person.
http://www.restek.com/chromatogram/view/GC_CH00284
Rather than getting tied down to only thinking about, and continuing to try to overcome, problems created by this analysis in terms of aqueous injections and pH -
If it continues to be a problem then perhaps you should consider an alternative approach of using DCM or MTBE liquid/liquid extraction of your aqueous samples (after pH adjustment) to overcome possible pH and aqueous injection problems ?
e.g.
Determination of volatile fatty acids in wastewater by ... - ResearchGate
https://www.researchgate.net/...acids/. ... +volatil...
30 Oct 2013 - fatty acids collected at the elutriation units of Unit 3, 4 and 5 at Johannesburg Water-Northern Works ... the ratio of propionic to acetic acid was good since the ratio o did not exceed 1.4with the exception of the samples collected on .... able to separate using the Stabilwax-DA column and then detected by the ...
Looking forward to your updates
Ralph