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Storage Stability Studies of Milk Powder with Different Forms of Packaging
Author(s): 
Pages: 25-28
Year: Issue:  5
Journal: Journal of Dairy Science and Technology

Keyword:  milk powderpackagingstability2-thiobarbituric acid value (TBA)color evaluation;
Abstract: 研究不同包装材料(铝箔袋:聚酯(polyethylene terephthalate,PET)/聚酰胺(polyamide,PA)/铝箔(aluminum foil,AL)/聚乙烯(polyethylene,PE);杯装胶囊1:聚丙烯(polypropylene,PP)/乙烯-乙烯醇共聚物(ethylenevinyl alcohol copolymer,EVOH) /PP;杯装胶囊2:PP包装的乳粉,在恒温恒湿培养箱内37℃或42℃、相对湿度75%的条件下加速贮存12周,乳粉水分含量、水分活度(water activity,aw)、色泽及硫代巴比妥酸(thiobarbituric acid,TBA)值的变化.结果表明:相同条件下,铝箔袋包装的乳粉水分含量、aw在加速贮存实验过程中处于相对稳定,色差△E和TBA值随着加速时间的延长而增高;胶囊包装的乳粉在加速贮存实验期所有指标(水分含量、aw、亮度值£*、红度值a*、黄度值b*、△E及TBA值)都持续性增高,且胶囊1乳粉各指标的变化幅度小于胶囊2.结论:铝箔袋包装对乳粉的保护性最好,胶囊1次之,胶囊2最差,开发胶囊乳粉优选胶囊1材质.
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