12 votes
Accepted

Does molten metal liquid chromatography exist?

An obstacle of implementation is that the blend of metals has to be kept liquid all the time the chromatography runs, top to bottom of the column, while the equipment around has to sustain the ...
Buttonwood's user avatar
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9 votes

Does molten metal liquid chromatography exist?

Molten liquid chromatography does not exist currently. However the problems you mentioned for purifying metals is very conveniently done using ion-exchange chromatography. A lot of difficult to ...
AChem's user avatar
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4 votes

Does molten metal liquid chromatography exist?

Not really, but you can identify metallurgical processes that rely on principles of phase separation and immiscibility of different components in molten salts, for instance during the production of ...
Buck Thorn's user avatar
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4 votes

Are there LCMS compatible buffer systems available for the high pH range 12-14?

First off, as a comment implies you need the right column. Silica-based columns are not suitable for high $\pu{pH}$, even $\pu{pH }8$ can cause problems according to a now-deleted comment in the ...
Oscar Lanzi's user avatar
4 votes
Accepted

How can I approximate the actual HPLC gradient?

Based on the comments of @AChem and @Poutnik the "exponential response with transport delay" seems to be ok for my use use-case. The Paper “Measure Your Gradient”: A New Way to Measure ...
Peter's user avatar
  • 181
3 votes

How to divide the peaks of two anion ions using ion chromatography?

A mixture of roughly-symmetric peaks can be achieved by a sum of exponential functions. $$f(x; \vec a, \vec m, \vec s) \triangleq a_{1}\exp\left(-\frac{1}{2}\left(\frac{x-m_{1}}{s_{1}}\right)^{2}\...
Galen's user avatar
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3 votes

Term for one chromatography sample affecting the next?

Yes, it is termed "carryover". Carryover is recognized as the presence of a small analyte peak that appears when a blank is injected following the injection of a sample that produces a ...
Galen's user avatar
  • 673
3 votes

How to effectively replace DMSO with LC–MS-compatible solvent for the samples from a well plate?

The standard way to remove water and replace with volatile solvents for microscopy is with a dehydration series, e.g., replacing water with ethanol, and then ethanol with acetone. To more thoroughly ...
DrMoishe Pippik's user avatar
3 votes

Is there any reason why KMnO4 for TLC is stored under basic condition?

Two reasons come to mind: It's made that way. Potassium permanganate is made by oxidizing manganese dioxide (available as the mineral pyrolusite) with air in concentrated potassium hydroxide (to form ...
Oscar Lanzi's user avatar
2 votes

How to interpret gas chromatography results?

The problem has nothing to do with gas chromatography. It has to do with the kinetics of a chemical reaction. Whatever the method used to get the concentrations, when you get the concentrations of the ...
Maurice's user avatar
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2 votes

Does molten metal liquid chromatography exist?

Liquid chromatography is used to analyze and purify different chemical samples in a solvent... I was wondering if something similar exists for liquid (generally molten) metals. The detail to remember ...
DotCounter's user avatar
1 vote

Aliphatic alcohol analysis in capillary gas chromatography

The first two quotes refer to solutions of aliphatic alcohols; here "C20 to C28" indicates a range of the number of carbon atoms in each of the molecules, which can be 20, 21, 22, 23, 24, 25,...
Buttonwood's user avatar
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1 vote

How does industry separate glucose from fructose using liquid chromatography when producing high-fructose corn syrup?

I was surprised, I got feedback so quickly, I thought I was asking into the void. The production of HFCS-55 goes through this process: Corn kernels are ground into corn starch α-Amylase enzyme ...
vossman77's user avatar
  • 121
1 vote

How does industry separate glucose from fructose using liquid chromatography when producing high-fructose corn syrup?

I am glad that you realized that ion-chromatography is not an effective chromatographic mode for separating neutral molecules. However, we should not forget the backbone of cation or anion exchange ...
AChem's user avatar
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