This International Standard specifies a polarimetric method for the determination of the starch content of native starches, with the exception of high amylose starch. It does not apply to modified or pregelatinized (water soluble) starches.
DS/EN ISO 10520:1999 history
1999DS/EN ISO 10520:1999 Native starch - Determination of starch content - Ewers polarimetric method