analyze hexane, heptane and isopropyl alcohol mixtures

[gugu701]

Hi all,
asking some help here. I am using GC/MS to analyze hexane, heptane and isopropyl alcohol mixtures. I have the freedom to select a solvent.
The solvent that used to dissolve the standard was methanol. However, I really having a hard time to separate the three compound from the solvent, maybe due to their b.p.s being too close?
so two questions:
(1) is there any tip to optimize the separation conditions to make the peak show up?

(2)should I switch to an easier solvent? if so, any suggestions?

Thanks so much for your help!!

[Alfonso]

Hello,

My name is Alfonso Madrigal and I work for Advanced Analytical Systems. We specifically provide laboratory support services, such as laboratory instrumentation sales and servicing, monthly maintenance plans including on-site and remote access, troubleshooting and complete instrument repairs, as well as our method development or even our custom laboratory information management systems (LIMS).

AAS specializes in servicing current and older instruments of Varian/Bruker, HP/Agilent, Shimadzu, SRI, and Antek. Our on-site services vary from weekly, monthly and yearly. Additionally, we provide exceptional operator training that improves relations between users and advanced software.

If you have any needs in regard to your laboratory, gas chromatographs, software, or any instrumentation at all, please feel free to contact me with any questions.


Alfonso Madrigal (amadrigal@aasystems.com)
Advanced Analytical Systems

P: 562-852-6071
W: AASystems.com

[ant78se]

Hi,

Could you be more specific about the sample and what column do you use? I guess that your ramping too fast.

Regards,
Alvin