Volume XXXII - Issue III - July./ Sep, 2022
Prof. PO-2022-0033
Ailton de Souza Gomez Emeritus Professor, IMA/UFRJ
Starch + Iodine Films
021 Pol, 2 B C 16 Preto Ouro th
Sodium metabisulphite Complex formed between amylose ribbon and iodine ions
Indicator Label
Shrimp paste
Reactions between iodine and SO2 present in the medium − + IO− 3 + 5I + 6H → 3I2 + 3H2 O
2− − + I2 + HSO− 3 + H2 O → 2I + SO4 + 3H
I2 + I− + starch → starch − I3− (blue complex)
Increasing the SO2 concentration in the medium
A schematic depiction of the indicator label’s application as smart packaging and the chemical reactions that occur.