“…Generally, the higher the absolute value of ζ-potential (>±30 mV), the stronger the electrostatic repulsions and the more stable the emulsion (Xiong et al, 2019). Conversely, lower ζ-potential values (<±30 mV), such as those observed in this study (-20 mV), may confirm the steric mechanism as dominant in the stability of the emulsion (Sena et al, 2019). This steric mechanism in the gum arabic gum/pectin, confirmed by the negative charge of ζ-potential may be possibly due to the carboxylic acid and anionic behaviour of gum arabic and pectin biopolymers due to carboxylic acid content in their structure, which gives them a negative charge (Timilsena et al, 2016).…”