Abstract: Pectic acid is measured by colorimetry using a carbazol-reagent.
This method is applicable to beet processing liquors, such as samples from extraction, raw juices and pulp press water samples.
This method determines high molecular mass pectin as pectic acid in beet juices at mass concentrations of pectic acid greater than 50 mg/L.
Repeatability relative standard deviation (RSDr) varies between 3% at best to 5% at low concentrations.
Online Access to ICUMSA Method GS8-25 (1994)
Access to the online Version of ICUMSA Method GS8-25 (1994) can be obtained from the Sugar Industry Website, operated by Bartens. The online access for two years costs EUR30 (+ 19 % VAT for German and EU citizens without EU VAT No.).