The following silica gel TLC was developed in hexane : ethyl acetate (1:1), is t
ID: 971522 • Letter: T
Question
The following silica gel TLC was developed in hexane : ethyl acetate (1:1), is this a good TLC? Why? If it is not a good TLC, how can you improve it? One of the ingredients in Sriracha is potassium sorbate. You are given 5 sauces (sample B - E) that all resembles Sriracha. You decide to run a TLC with the extract of each condiment alongside potassium sorbate (sample A). Determine the R_f values of the 6 samples and determine which is really Sriracha. Rank the polarity of the samples. Is the structure of potassium sorbate consistene with the relative polarity?Explanation / Answer
1. It is not good TLC because compound spot is very close to base line. And compounds are not separated.
3. Rf value
A = 2/7= 0.28
B = 6/7= 0.86
C= 4/7= 0.57
D= 2/7= 0.28
E= 6/7 = 0.86
F= 1/7= 0.14
Compound A and D are same.
Polarity: F > A=D > C> B=E