CRITICAL SITUATIONS AT THE DETERMINATION OF THE DEGREE OF SUBSTITUTION FOR AMYLOSE COMPOUNDS VIA THEIR CARBON CONTENT

The degree of substitution (DS) of amylose compounds is not always asc ertainable via their carbon content. Critical situations arise for der ivatives with one substitute, if the carbon contents in the latter and in pure amylose (4/9 approximate to 0,444) are equal. In practice, on e encounters that scarcely. Disubstituted amylose compounds exhibit a large number of critical situations. That depends on the DS of the det ermined substituent and is possible only, if the substitute that is to determine is the smaller one. The critical DS(1)=DSKT, may become eve ry value between 0 and 3. Al trisubstituted compounds critical situati ons arise rarely. It is necessary for that, that the substitute that i s to determine [DS(3)] has a size between the both known substituents. The sum DS=DS(1)+DS(2) of the latter is, obviously, always greater th an 2. All pairs DS(1) and DS(2) are connected by linear equations. Spe cial and common formulae were derived for prediction of critical situa tions for all amylose compounds.