Water determination in aldehydes and ketones

contributed by Honeywell | 09/12/2017

Both aldehydes and ketones pose problems with Karl Fischer titration because they form acetals and ketals respectively with conventional KF reagents (Figure 9.6.a). The reaction forms water, which is also titrated, resulting in vanishing end points and erroneously high water content. With aldehydes a second side reaction, the bisulfite addition, can also occur (Figure 9.6.b). This reaction consumes water and leads to an erroneously low water content.

Log in or register to read this article in full and gain access to The Analytical Scientist’s entire content archive. It’s FREE!

Email*

Choose a password

I have read and understand the Privacy Notice *

Stay up to date with our other newsletters and sponsors information, tailored specifically to the fields you are interested in

Receive communication from The Cannabis Scientist I want to stay up to date with the Mass Spectrometry field I want to stay up to date with the Spectroscopy field

When you click “Subscribe” we will email you a link, which you must click to verify the email address above and activate your subscription. If you do not receive this email, please contact us at [email protected].
If you wish to unsubscribe, you can update your preferences at any point.