市售益生菌乳制品的质量分析

摘要

通过检测分析益生菌乳制品在产品贮存条件下,菌落总数、大肠菌群、乳酸菌总数、乳杆菌、嗜热链球菌、酸度、pH值等指标对市售益生菌乳制品在货架期的质量变化进行了分析.结果表明:益生菌乳制品在货架期内,菌落总数大多没有检出,大肠菌群没有检出、乳酸菌活菌数呈下降趋势,pH降低,酸度上升,感官评定有所下降,但各项指标均都符合国家标准.%Detection analysis quality variation of commercial probiotics dairy products in shelf life (2～6 ℃) through the indexes of probiotic dairy products in storage conditions:the total number of colonies,coliform group,the total number of lactic acid bacteria,Lactobacillus,Streptococcus thermophilus,acidity,pH value and other indicators.The results show that the probiotic dairy products were in shelf period and the mostly number of colonies were not detected,coliform group was not detected.Viable count of lactobacillus was on a declining curve and pH value was decreased while acidity was increasing,sensory evaluation was declined somewhat,but the indicators are in line with national standards.