Gas chromatograph
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This post was last edited by zbx on 2010-1-19 16:44. How does the GC FID determine the peak areas of 50% toluene and 50% methanol when analyzing a mixture of these two substances? (The area percentage method is used) Thank you!
The original poster should first clarify one thing: 50% toluene and 50% methanol cannot be mixed into a single phase; they will separate into layers. Because toluene and methanol are immiscible, they separate into two layers. Using chromatographic analysis, one can only determine whether to analyze the methanol layer or the toluene layer. I think the friend upstairs also has doubts about the description of your problem; please ask the original poster to investigate the situation of the sample thoroughly. If it’s a hypothetical question, please imagine it based on real-world circumstances.
Get the results directly from the workstation.
First of all, thanks to the person from the third floor. It’s not entirely clear whether toluene and methanol are miscible, and the original poster also didn’t explain things clearly. Try mixing methanol and toluene in a volume ratio of 1:1 and see if a separation occurs. If there is a separation, then follow what was suggested by the third floor – take samples from each phase in order to determine the proportions within those two phases. As for the peak areas you need for each, they should be available using the workstation; if not, the original paper-cutting method can also be used. Most importantly, what is the purpose of you doing this? What parameters need to be found. In this way, fellow sailors can better understand your intentions so as to help. Old Ox
The acquisition of peak area is actually a matter related to how your gas chromatography workstation processes data; therefore, you need to figure out for yourself how your workstation performs integration and how to set the integration parameters in order to obtain the corresponding integrated area
I hope the original poster will pay close attention to their own posts; I’m trying to understand your ultimate goal and the solutions you propose