Sept Quiz Question 6

By dc612 in 24 Oct 2021 | 04:02
dc612

dc612

 Student
Posts: 10
Member since: 12 Aug 2020
Hi Kerry, On Rich's Phytochemistry and Medicine Making sheet it says that saponins are water soluble, so I'm puzzled that the answer is "water and glycerine" for the question about the solvent that does not dissolve or mix with "many saponins", among other things. Are some saponins water soluble and others not? thank you, Diana
24 Oct 2021 | 04:02
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Eileen

Eileen

 Staff
Posts: 215
Member since: 16 Dec 2019
Rich said: Saponins are generally water soluble like what my handout says, as well as being glycerin soluble as Amanda said. This is because they are glycosides, so the triterpene part of the molecule is not very water soluble, but being a glycoside makes it so. In addition, generally what is water soluble is going to be fairly glycerin soluble, and vice versa, because they share a similar polarity. Glycerin is slightly less polar than water but not by much, so glycerin will pick up a bit more of less polar constituents, but not nearly as much as alcohol does, for example. Sorry for the delay!
19 Nov 2021 | 20:04
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