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Disposable pH sensor
Dvořáčková, Sabina ; Kovalčík, Adriána (referee) ; Veselá, Mária (advisor)
This bachelor thesis deals with thin polymer layers containing substances capable of reacting to changes in the pH. In theory are processed informations of smart packaging including legislation of general food packaging. Natural substances forming the basis for the production of edible films are also described. An indicator of ammonia in composition of PVA and red cabbage anthocyanins was studied here. The prepared layers were tested for gaseous NH3. Layers containing anthocyanins responded with a very intense color transition from purple and blue to turquoise.

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