Antimicrobial compounds such as sodium benzoate, potassium sorbate and nisin
were chosen based on their different physical and chemical properties. Coomassie blue
dye was used as a model compound for proof of concept. Films were produced from LM
pectin by varying the DE of pectin and calcium concentration using the solution casting
method. Release of antimicrobial compounds into water as a food simulant was measured
by UV/Visible spectrophotometry or HPLC or agar diffusion assay, depending on the
antimicrobial compound being evaluated.