extracted caffeine by using chloroform and magnesium sulfate to dehydrate the organic phase. I got crude caffeine just by solvent evaporation at room temperature. However, I wanted to conduct Raman spectroscopy measurements but I did not get the characteristic peaks. I think that it has to be whit chloroform presence. So I let the crude caffeine 24h at 65 degrees but still I did not get any peak. What can I use to rinse my crude caffeine extract to remove all chloroform molecules? Or what is wrong with my extraction?

extracted caffeine by using chloroform and magnesium sulfate to dehydrate the organic phase. I got crude caffeine just by solvent evaporation at room temperature. However, I wanted to conduct Raman spectroscopy measurements but I did not get the characteristic peaks. I think that it has to be whit chloroform presence. So I let the crude caffeine 24h at 65 degrees but still I did not get any peak. What can I use to rinse my crude caffeine extract to remove all chloroform molecules? Or what is wrong with my extraction?

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter20: Molecular Mass Spectrometry

Section: Chapter Questions

Problem 20.9QAP

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I extracted caffeine by using chloroform and magnesium sulfate to dehydrate the organic phase. I got crude caffeine just by solvent evaporation at room temperature. However, I wanted to conduct Raman spectroscopy measurements but I did not get the characteristic peaks. I think that it has to be whit chloroform presence due to its fluorescence. So I let the crude caffeine 24h drying at 65 degrees but still I did not get any peak. What can I use to rinse my crude caffeine extract to remove all chloroform molecules? Or what is wrong with my extraction?
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