In this experiment we injected the sample to be analyzed by Gas Chromatograph eq

Question

In this experiment we injected the sample to be analyzed by Gas Chromatograph equipped with an FID (Flame Ionization Detector). The detector ionizes the sample as it reaches it, and the peak is proportional to the number of ions with a live flame. A chemist performed a distillation of methanol and water and wanted to analyze the results using the same GC instrument with FID. Could he use a similar procedure to analyze the results of his experiment? Explain why yes or no?

Ethylbenzene and o-xylene can be separated and analyzed using GC without injecting an equimolar standard to a high accuracy. Explain why that is the case for these two compounds while we had to inject an equimolar solution for our experiment.

The separation of two liquids on the GC is very similar to the distillation process. Compare the two methods describing the process while pointing out to the similarities and differences between the two methods.

Explanation / Answer

Yes. We use same GC instrument with FID (Flame ionization detector). FID measures the number of ions produced. The peak intensity is proportional to number of ions. Both water and methanol produce two ions.

Both ethyl benzene and o-xylene are non-polar compounds, so these are easily passed through the Gas chromatography column. Among the both compounds goes faster than the o-xylene. Thus, these compounds cannot be injected in equimolar mixture.

Distillation and gas chromatography are used to separate the compounds in a mixture based on their boiling point difference.

             Gas chromatography is used to separate the compounds in small scale. Where as in distillation process, we can separate the   compounds in large scale.

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