Chromatography Forum

Operating on a Varian 3800-1200L GC/MS system:

Seeking comparison information of column performance for alcohols on VF-1MS (Varian) versus HP-1MS (Agilent). Although they ideally should be the same, we all know that isn't always the case. I currently have HP-1MS installed.

Application is analysis of fire or "arson" debris for ignitable liquids, such as gasoline, lighter fluids, etc. The HP-1MS can separate oxygenated solvents, but I have no experience with the Varian columns. Management prefers that I use a single supplier (less paperwork for order requests), so I may be forced to purchase the VF-1MS, unless I can show why it isn't suitable. This is rather difficult to do since I don't have one to compare. I have VF-5MS. However, the VF-5MS has less than adequate resolution for my purpose.

Thanks in advance for your help.

Hi, the Varian columns are formerly Chrompack columns, a brand that is very wel known and recognized all through Europe. The VF line is a new generation line of low-bleed columns which is specified on maximum bleed value. Running the samples you mentioned will be no problem at all. We have >3000 applications to show. You can look up yourself via the ScanWeb search engine and download the chromatograms as PDF file. http://www.varianinc.com/cgi-bin/scanweb/scanview
If any other question, let us know,
regards
jaap

Thank you for the reply, but the request is more specific than any of those application notes address.

Unless I missed it, none of them regard the specific separation of oxygenates with the VF-1MS. Obviously, other columns would be ideal for the separation of oxygenates, but the HP-1MS has been proven to be suited for broad range fire debris analyses, from ethanol and acetoneto heavy petroleum distillates.

Former experience with an HP-5MS disclosed less resolution of oxygenates than with the HP-1MS.

Based on the data collaboration of the forensic community proficiency testing for fire debris analyses I noted that several brands and types of columns were in use. However, I also noted that several do not scan for alcohols.

I was hoping to reach a greater community than just the forensic sciences on this forum.

Thanks again.