All Questions
Tagged with chromatography physical-chemistry
5
questions
1
vote
1
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248
views
When to use chromatographic separation vs vacuum-assisted rectification distillation?
I'm trying to understand a bit more about industrial scale separation processes. One particular element I'm interested in is the question as to when chromatography (HPLC or Simulated Moving Bed) may ...
- 11
3
votes
0
answers
3k
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Predict polarity (TLC, column) using ChemSketch (-Draw)
I'm currently working on a project where I have to make and isolate often quite similar molecules. But, as I change the functional groups the overall electronic situation and polarity of the product ...
- 4,322
3
votes
1
answer
265
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Which characteristics of the compound affect the number of theoretical plates in a GC experiment?
Some days ago, I tried for the first time a chromatography machine.
The data I collected are the following:
$$
\begin{array}{lrrr}
\hline
\text{Compound} & t_\mathrm{R}/\pu{min} &...
user32223
1
vote
2
answers
789
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What are some general tests that would determine an unknown compound?
I know a little bit about unknown compounds but I am still new to the topic here. I know that you could use filtration, chromatography and distillation. You can also combine the unknown with others to ...
- 3,050
10
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2
answers
9k
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Gas chromatography/mass spectrometry: Can I use peak ratios and molecular mass to derive quantity?
Can derive the quantity of a substance from a GC/MS report if I know:
the ratio to another substance in the data,
the quantity of that second substance, and
the molecular mass of both substances.
...
- 209