0 , l und 1,4 wurden verschiedene Varianten der To talhydrolyse anionischer Celluloseether rnit Schwefelsaure und Trifluoressigsaure verglichen. Als Kriterium fur die Vollstandigkeit der Hydrolyse diente die enzymatisch bestimmte Glucosemenge im Hydrolysat unter Zugrundelegung des SPuRLIN-Modells fur die Substituentenverteilung. Entscheidende Voraussctzung fur eine vollstandige Spaltung der Glucosidbindungen ohne wesentliche Zersetzung der Spaltstucke ist die ausreichend hohe Quellung des Substrats bzw. seine mogliclist rasche Auflosung im Hydrolysemedium. Nccneaoeanue zu8ponumuuecnoii aecmpynquu soaopacmsopuntux npouasoanux yennmno3~ 8 zomozennt,nx ycnoewx. Co06q. 3-oe. kiccneaoeanue nonnozo zuaponusa cepnoii u mpu@mopyn ycnoii nucnomamu anuonnbix npocmux 3$UpOS qen.~ono3u n p O B e A e H 0 CpaBHBTeJIbHOe BCCJleAOBaHHe pa3JIHYHMX BapHaHTOB nOJIHOrO CHjqpOJIH3a CepHO& A TpH@TOpyKCyCKOfi KHCJIOTaMA aHHOHHMX IIpOCTblX 3@BpOB qeJIJIIOJIOi3E.l B BHjqe o6paaqo~ Kap6OKCHMeTUJI-A Kap60KCA3THJIqennmnO3E.l co C.3. B n p e j q e s a x OT 0,i jqo 1,4. B K a q e c T B e K p a T e p m A ~H ~OJIHOTH r ~~p o n ~a a cnym~no ~H ~H M ~T A ~~C K A onpej q e m e m o e K o m w e c T B o rnm~oab~ B rvrAponvraaTe H a o c H o B e MoAenvr CnvPnmiA j q m pacnpenenemn s a ~e c ~u ~e n e ~. c T p a T a HJIH ero B O ~M O ~H O 6blc~poe p a c T s o p e H H e B r ~j q p o ~~m y m ~q e i cpene.
Investigations on the hydrolytic degradation of water-soluble cellulose derivatives under homogeneous conditions of reaction. 3rd Comm.: Studies on total hydrolysis of anionic cellulose ethers with sulfuric acid and trifluoro acetic acid
With a series of carboxymethyl and carboxyethyl celluloses (DS 0.1 to 1.4) different procedures of total hydrolysis of these anionic cellulose ethers with sulfuric acid and trifluoro acetic acid are compared. Completeness of hydrolysis was assessed by enzymatic determination of the glucose content in the hydrolysate. Calculations of theoretical glucose yield are based on SPURLIN'S model of substituent distribution. Excessive swelling or fast dissolution of the substrate in the reaction medium was found to be a decisive premisse for complete cleavage of glycosidic bonds without significant decomposition of the fragments obtained.