EN ISO 11213:1995

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 Preparation of the sample
7 Procedure
8 Expression of results
9 Precision
10 Test report
Annex A (informative) Derivation of equation for calculation
         of acetyl content
Annex B (informative) Statistical results of the interlaboratory
         test
Annex C (informative) Bibliography
Annex ZA (normative) Normative references to international
         publications with their relevant European publications

Applies to modified starch, both granular and soluble in cold water. The methods specified enable to measure total and free acetyl contents; bound acetyl content is calculated as the difference of the two values. Total content is determined by heating the sample with dilute hydrochloric acid and converting the acetate with adenosine-5-triphosphate (ATP) and coenzyme A (CoA) to acetyl-CoA. The methods are suitable for determining acetyl contents up to 2 % (m/m).