Feasibility of UV-VIS-SWNIR spectroscopy for monitoring chitosan edible coatings

Abstract

[Excerpt] Edible coatings have long been known to protect perishable food products from deterioration and loss of quality. Chitosan coatings have an oilfree appearance, a low caloric content and can be used to increase the shelf-life of foods. The objective of this work was to study the ability of UV-VIS-SWNIR spectroscopy in monitoring the composition of chitosan edible coatings in different formulations of plasticizers: i) glycerol (87%, Panreac, Spain): 0 to 2 (w/v); ii) glycerol/sorbitol (50:50) (97%, Acros Organics, Belgium): 0 to 2 (w/v); and iii) corn oil: 0 to 0.6 (w/v) (Sovena, Portugal). [...]