*2.3. pH Determination*

The pH of the brine solutions and the pH of the soap, after the maturation process, were determined with a digital benchtop pH meter (HANNA Instruments, Edge PH-HI2020, Smithfield, Rhode Island, USA) with glass immersion electrode.

The pH of the brine was determined by taking 50 mL of solution after mixing the fermentation mass.

The pH of the soaps was determined by solubilizing 1 g of soap, the inner part, in 50 mL of deionized water [7,8].
