Application of Chitosan-Lignosulfonate Composite Coating Film in Grape Preservation and Study on the Difference in Metabolites in Fruit Wine

In order to solve the global problem of fruit rotting due microbial infection and water loss after harvest, which leads a large amount food waste, this experiment uses degradable biological composite coating prolong preservation period grapes. Chitosan (CH) Lignosulfonate (LS) were used as Bio-based film materials, CH films, 1% CH/LS films 2% biomass synthesized by classical casting method applied grape packaging. Its effect was tested spoilage rate, hardness, soluble solids, titratable acid, compared with plastic packaging material PE film. At same time, 1H NMR technology combined pattern recognition analysis (PCA) partial least squares discriminant (PLS-DA) determine nuclear magnetic resonance (NMR) Cabernet Sauvignon, Chardonnay Italian Riesling wines from eastern foothills Helan Mountain explore differences in metabolites wine. The results showed that grapes quality package is better than control group, decay rates decreased 37.71% 21.63% 18.36%, respectively, hardness increased 6.83 10.4 12.78 solids 2.1 group 3.0 3.2. terms wine metabolites, there are similar types between cabernet Sauvignon dry red white wine, but significant content. study found could not only reduce rate grapes, inhibit consumption acids, also effectively extend shelf life 6 days.