I use different solvent systems e.g. MeOH:H2O (1:1), An/H2O (70:30) and I would like to compare them in terms of polarity.
Hi gloria, I was wondering the same and found this link which might be useful for you
http://pharmlabs.unc.edu/labs/solubility/structure.htm
Hi gloria, I was wondering the same and found this link which might be useful for you
http://pharmlabs.unc.edu/labs/solubility/structure.htm
Hi! Thanks for the link, about two months ago, i found a very similar information in this article. Hope it would be useful for you! Saludos.
Dear Gloria Ivonne Hernández Bolio
Can you advised me how could I calculate dielectric constant of a mixture of solvent where lets say aquas part and alchohol part ratio I am varying time to time at a particular temp.
According to Poole, C.F.; Poole, S.K. Chromatography Today; Elsevier: Amsterdam,1991, the polarity index P’ of a mixed mobile phase is the arithmetic average of the solvent polarity index weighting factor adjusted according to the volume fraction of each solvent as is given by
P’= ∑iP’i ∅i
where P’i is the polarity index weighting factor of solvent i and ∅i is the volume fraction of solvent i. For example, for a binary solvent mixture containing 95% dichloromethane and 5% methanol, the polarity index of the mixed solvent is calculated as follows:
P'=(4.29)(0.95)+(5.10)(0.05)=4.33
You may search solvent polarity index, if you dont have any.
Good luck
How to calculate dipole moment, dielectric constant and dimroth reichardt parameters of sunflower oil, sesame oil and soybean oil?
Your using MEOH,H2O in 1:1 ratio means 5.1(0 .5)+10.2(0.5) equal to 7.65.
Example:10%acetone,dcm means 5.1(0.1)+3.1(0.9) equal to 3.3
Now you can calculate and decide the polarity of any mixture.
Values taken from poarity index table
how can i calc. the dielectric const. of mixture materials ? such as carbon+rubber+cupper ...
- Badges
- Science topic
- Similar topics
- Analytical Chemistry
- Extraction