Alik Kandhita Febriani

4 Questions 2 Answers 0 Followers

Questions related from Alik Kandhita Febriani

Why did i get other spot on tlc of phenolic acid i got from preparative tlc?

I did preparative tlc of extract and i got a band of phenolic acid (confirmed by FeCl3 1% spray reagent). The compound uv vis spectra resembles chlorogenic acid spectral, but when i did tlc of the...

01 October 2020 4,615 2 View

What is mobile phase for very polar coumarin to use for Column Chromatography?

I have a fraction that i got from Vacuum liquid chromatography with ethyl acetate:ethanol:water (100:26:1). The fraction contains of coumarin in a low Rf value (checked on tlc), so i decided to...

10 August 2020 5,441 6 View

What is the best solvent to recrystillize a polar coumarin?

I got a fraction contains of two or more compound by vacuum liquid chromatography with ethyl acetate:ethanol:water (100:26:10). The fraction was evaporate and i got chrystal mixed with brown semi...

08 March 2020 801 7 View

What kind of compound that absorbs and fluorescence in UV 366 nm but doesnt show any spot in UV 254?

So i run TLC of pure compound (i thought it's pure compound), but i got another spot that give fluorescence in UV 366 nm but doesnt show any spot in UV 254 nm. What kind of compound is that? I...

22 February 2020 5,085 3 View