title: An iodine supplementation of tomato fruits coated with an edible film of the iodide-doped chitosan.
abstract: In general, the risk of numerous thyroid cancers inevitably increases among people with iodine deficiencies. An iodide-doped chitosan (CT-I) solution was prepared for dipping tomatoes to coat the fresh surface with an edible film (1.5 μm), thereby providing iodine-rich fruits for daily intake. Characterisation of the thin film was conducted by FTIR and SEM. Stability of the CT-I film was studied via water immersion at various time intervals, and no residual iodide leached out due to intrinsic interactions between the cationic amino group of chitosan and iodide ions. Moreover, the iodide supplement exhibited no effect on the antioxidant activity of tomatoes. The iodine content in the film-coated tomato was determined by ICP-OES. The tomato coating with 1.5% (w/v) CT-I contained approximately 0.4 μg iodide per gram fresh weight. In addition, the freshness and storability of iodine-doped tomatoes were also maintained for shelf-life concerns.
authors.affiliation: Materials Chemistry Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
authors.forename: Nunticha
authors.initials: N
authors.lastname: Limchoowong
authors.affiliation: Materials Chemistry Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
authors.forename: Phitchan
authors.initials: P
authors.lastname: Sricharoen
authors.affiliation: Department of Plant Science and Agricultural Resources, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
authors.forename: Suchila
authors.initials: S
authors.lastname: Techawongstien
authors.affiliation: Materials Chemistry Research Unit, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand. Electronic address: sakcha2@kku.ac.th.
authors.forename: Saksit
authors.initials: S
authors.lastname: Chanthai
mesh_terms: D048271:Chitosan / Q000737:chemistry*; D019587:Dietary Supplements / Q000706:statistics & numerical data*; D005638:Fruit / Q000737:chemistry*; D007454:Iodides; D007455:Iodine / Q000032:analysis / Q000627:therapeutic use*; D018551:Solanum lycopersicum / Q000737:chemistry*
chemical_list: D007454:Iodides; D048271:Chitosan; D007455:Iodine
keywords: 2,2-Diphenyl-1-picrylhydrazyl (Pubchem CID: 74358); Catechin (Pubchem CID: 9064); Chitosan; Dipping method; Ethanol (Pubchem CID: 702); Glacial acetic acid (Pubchem CID: 176); Iodide; Iodine supplement; Potassium iodide (Pubchem CID: 4875); Sodium carbonate (Pubchem CID: 10340); Thin film; Tomato