Abstract:This laboratory study was initiated in order to get the conditions of process and technics of AD Rohdea japonica Roth retort pouch, one of the main points in the technics is to determine the selection and the concentration of the colour fixatives, the other one is the determination of the temperature and the time of sterilization, finally, do the tests of the senses, soluble solids and microbiological examination. A novel food additive-- trehalose is used, as a colour fixative, the research will tell us which is better-- work alone or as a complex (with ZnCl2). Because of the material is AD Rohdea japonica Roth, so in this experiment, I choose LTLT sterilization. The extraction of chlorophyll is extracting in the mixture that mixed up by 95% of ethanol and 80% of acetone(1:1), measure the absorbances after 24 hour by UV-VIS spectrophotometer. The results showed that when trehalose is compounded with ZnCl2, white floc precipitation will be generated, and content of chlorophyll also show us that the complex isn’t a good choose; meanwhile, we find that the changing of the colour fixative’s or sterlization’s condition work little on the results of soluble solids. After comparison and sum-up, we get the best conditions of colour-pretected and sterilization eventually: dip in 1.5% trehalose solution for 1 hour, sterilizate in the temperature of 70℃ for 30 minutes.
关键词:海藻糖护色;杀菌时间;杀菌温度;可溶性固形物含量;微生物检测
Keywords:The fixation of colour by trehalose, the time of sterilization, the temperature of sterilization, soluble solids, microbiological examination