Total Phenolics

This method is used for determination of total phenolic compound concentration in wine using the Astoria Flow systems. The applicable range is 100 to 4000 mg/L gallic acid equivalents (GAE).

Summary

Phenolic compounds in wine and juice samples are reduced by Folin-Ciocalteu reagent and the absorbance is measured at 750 nm. The absorbance is proportional to the total phenolic concentration.

Limitations

Readily oxidized compounds (i.e. ascorbic acid, sulfur dioxide) could interfere.

Availability