无包装糕点中菌落总数的生长情况

Growth of Total Colonies in Unpackaged Pastries

目的旨在通过试验得出无包装糕点中菌落总数的生长情况。方法选择大型商超、中小超市、临街摊户各5个采样点,每个采样点各采集3份无包装糕点,按照常温(25℃~30℃)和冷藏(2℃~8℃)的条件保存。测定采样第1、3、5、7天的菌落总数。结果在保存期间样品均有检出;菌落总数初始合格率为93.33%,在冷藏、常温各保存7 d后,其菌落总数合格率分别为88.89%、86.67%;在大型商超采集的样品未出现不合格,在中小超市和临街摊户采集的样品均有不合格;此次采集的45份样品,在常温条件下,菌落总数的最高增长量为104.417 CFU/g;在冷藏条件下,最高增长量为102.494 CFU/g。结论在销售过程中应采取措施提高卫生质量,防止交叉污染;消费者也应关注采购环境和保存条件;无包装糕点易受环境因素的影响出现不合格,需要在食品监管方面给予更多关注。

Objective To obtain the growth of the total number of colonies in unpackaged pastries through experiments.Methods 5 sampling points were selected for large supermarkets,small and medium supermarkets,and street stalls.Each sampling point collected three unpackaged cakes,according to the conditions of normal temperature(25-30℃)and refrigerated(2-8℃)save.The total number of colonies on the 1st,3rd,5th,and 7th days of the sampling was measured.Results The samples were detected during storage;the initial qualified rate of the total number of colonies was 93.33%,and the qualified rates of the total number of colonies were 88.89%and 86.67%after 7 d of refrigerated storage and room temperature,respectively.Samples collected at large commercial supermarkets did not fail.The samples collected in small and medium supermarkets and street stalls were unqualified;the 45 samples collected this time,the maximum growth of the total number of colonies was 104.417 CFU/g under normal temperature conditions;the maximum growth under refrigeration amount was 102.494 CFU/g.Conclusion During the sales process,measures should be taken to improve the quality of hygiene and prevent cross-contamination.Consumers should also pay attention to the purchasing environment and storage conditions;unpackaged pastries are susceptible to environmental factors and appear unqualified,and more attention needs to be paid to food supervision.