Abstract
A procedure for the quantitative characterisation of the distribution of substituents in cellulose ethers is presented. After total hydrolysis in dilute sulphuric acid the sample is separated by thin-layer chromatography on silica gel according to number and type of substituents attached to the glucose unit. Quantitative evaluation of the chromatograms is performed by scanning photometry in the visible range. The procedure allows the determination of the percentages of tri-, di-, mono- and unsubstituted monomeric units in alkyl and alkylhydroxyalkyl celluloses. Data on the distribution of the hydroxyalkyl substituents in mixed ethers were also obtained. The reproducibility of the thin-layer chromatographic separation and that of the entire procedure are discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
