Adsorption was performed in the test systems, the test systems being plastic 12 ml test tubes comprising the predeterminedamount of the adsorbent.
A drink sample of 10 ml was poured into the test system, the test tube was closed and the mixture was thoroughly shaken on a Laboratory shaker type 358S (Elpan,Lubawa, Poland) at room temperature.
Then the supernatant was separated by 5 min centrifugation at 4185 ml g and used for the
further color measurement.