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Chromatography
Page 2
Questions (122)
we will do a project on this topic ;HPLC with fluorescence detection to quantify the amounts of various preservatives in several
1 answer
asked by
Cani
295 views
Separation / Chromatography
Lets assume I have three component mixture of liquids. And I wish to determine the quantity of each
2 answers
asked by
Ilginsh
601 views
What type(s) of chromatography is/are most appropriate for solids? Explain
----Liquid-Solid Chromatography ----Thin-Layer
2 answers
asked by
Anonymous
538 views
On a size exclusion separation column (e.g. Sephadex) would you expect the longer or shorter chain length compound to be eluted
1 answer
asked by
Anonymous
306 views
-----Chromatograph-----
Carrying out TLC on colorless compounds. Give two examples of methods to use in order to visualize the
1 answer
asked by
YuYing
457 views
why is retention and peak width measured in time? is there a better theoretical parameter?
3 answers
asked by
Anonymous
395 views
I'm using chromatography to identify compounds in a leaf extract for a lab, and one of the evaluation questions is 'Suggest a
3 answers
asked by
Erika
466 views
adjusted retention time is the time a species spends in the stationary phase. its the total time it takes the species to elute
1 answer
asked by
Instrumental
401 views
how can i find the standard rf values of food dyes ?
1 answer
asked by
QY
352 views
If i have a highly polar mobile phase, what will happen to the non-polar or less polar compounds during chromatography? will
1 answer
asked by
Anonymous
446 views
How will the Rf values be affected if i use a highly polar mobile phase instead of one that has intermediate polarity?
1 answer
asked by
Anonymous
361 views
How might chromophores, auxochromes, and solubilizing groups be responsible for the position of dyes on a chromatogram?
1 answer
asked by
Jerett
354 views
Thin Layer chromatography
TLC experiment What does it mean when it says with to much sample the spots will tail
1 answer
asked by
Nathalie
401 views
when 2 propanol was used as the developing solvent, two substances moved with the solvent front (Rf=1) during TLC analysis on a
3 answers
asked by
lili
1,936 views
Posted by anne on Saturday, October 15, 2011 at 1:03am.
Hi, Please advise on the following: - A procedure for the determination
1 answer
asked by
anne
398 views
Hi,
Please advise on the following: - A procedure for the determination of Impurities A & B in a compound says to use a 4.6 x
1 answer
asked by
anne
375 views
Posted by anne on Friday, October 14, 2011 at 6:30pm.
Hi, I have a question on HPLC (high performance liquid chromatography). The
4 answers
asked by
anne
437 views
Posted by anne on Friday, October 14, 2011 at 6:30pm.
Hi, I have a question on HPLC (high performance liquid chromatography). The
2 answers
asked by
anne
527 views
I have a method using HPLC (high performance liquid chromatography).
It states that a 4.6 x 150mm,3um column should be used.
1 answer
asked by
angie
423 views
A substance was tested for Impurity A using liquid chromatography. 2 determinations were performed.
In the 1st chromatogram,
2 answers
asked by
elizabeth
951 views
Hello, can you tell me why different colors have different rf values
4 answers
asked by
dan
349 views
Could you tell me,what is the specific mobile phase of lycopene when stationary phase is silica? Thank you.
1 answer
asked by
sine
385 views
why does fluorene elute first from the column
3 answers
asked by
cairo
748 views
Describe in general how chromatography technique can be used to analyses food to identify if it contains any poison? and also
1 answer
asked by
JazzMusick
437 views
which would have the lowest Rf value: biphenyl, benzil, and resorcinol?
5 answers
asked anonymously
23 views
Compare and contrast Ion-exchange Chromatography and Immobilized-metal Affinity Chromatography by considering the following:
1 answer
asked by
Michael
465 views
what is the rf value for peru balsam in order of identification?
1 answer
asked by
ira
325 views
what is the basic physical principle that chromatography is based upon?
4 answers
asked by
brown
1,238 views
I'm doing a science fair project on chromatography and I need some background info. What is chromatography?
4 answers
asked by
dragon girl
313 views
WHY IS RF VALUE ONLY UP TO 1 AND NOT ANY BIGGER?
1 answer
asked by
Anonymous
352 views
Which, 9-fluorenol or 9-fluorenone, would have higher Rf value on a silica gel plate with 30% acetone/70% hexane at the eluent?
2 answers
asked by
Jane
587 views
A student loaded a mixture, dissolved in 1cm3 of dichloromethane, CH2Cl2, onto a small flash chromatography column and then
1 answer
asked by
sue
546 views
I' am currently trying to wrie a couple of lab conclusions and having a hard time coming up with good points to make for the
3 answers
asked by
Richard
1,766 views
When a tlc plate was developed the solvent front ran off the top of the plate, why?
A two component mixture containing a
1 answer
asked by
Richard
1,190 views
can you give a comprehensive list of rf values.
rf: Radio Frequency? I am uncertain what the context of rf is. rf probably is
1 answer
asked by
damola
544 views
I did a column chromatography on spinach and then a TLC. On the TLC I got five visible bands of colors. On the extracted yellow
1 answer
asked by
Sheryl
1,175 views
Explain the forces acting on solute and stationary support in adsorption chromatography
1 answer
asked by
Kelvin
32 views
Discuss the principles of chromatography and its applications in separation and analysis
1 answer
asked by
Kelvin
39 views
Forces that act on solute and stationary phase in adsorption chromatography
1 answer
asked by
Kelvin
28 views
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The
3 answers
asked by
dakota
2,151 views
The following data are for a liquid chromatographic column:
Length of packing (L) 24.7 cm Flow rate 0.313 mL/min VM 1.37 mL VS
4 answers
asked by
Kurt
1,740 views
The percent water in methyl alcohol can be determined by gas chromatography using
a capillary column coated with a non-polar
2 answers
asked by
noha
1,093 views
(Paper Chromatography)
1. What carrier solution might work well to separate newspaper inks? Why? 2. What carrier solution might
1 answer
asked by
Mikaela
1,016 views
Arrange the following compounds in order of decreasing ease of elution from a column of silica gel: a) 2-octanol; b)
4 answers
asked by
Jeff
959 views
what would be the effect on a chromatographic peak of introducing the sample at too slow a rate
1 answer
asked by
noel
894 views
Chromatography seperating mixtures;
A couple questions I'm not sure how to answer. A) what evidence is there that a marker is a
3 answers
asked by
jay
744 views
What precautions must be taken when you introduce a mixture of compounds to be separated onto a liquid chromatography adsorbent
1 answer
asked by
Ryan
768 views
Why is caffeine susceptible to analysis by reversed-phase HPLC and why couldn't it be performed by GC?
1 answer
asked by
Lyndsay
763 views
why is a lid used in a chromatography experiment, and why do the colours travel different distances up the paper?
4 answers
asked by
Anonymous
774 views
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The
1 answer
asked by
dakota
726 views
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Parent Categories (8)
Analytical Chemistry
Analytical Techniques
Chemical Analysis
Chemistry
Chemistry/Analytical Techniques
Laboratory Techniques
Organic Chemistry
Scientific measurements