DIN EN ISO 6887-1:1999 食品和动物饲料微生物学.初始悬浮和十倍制稀释的微生物检验样品制备.第1部分:初始悬浮和十倍制稀释液制备一般规则
Microbiology of food and animal feeding stuffs - Preparation of the test samples, of initial suspension and of decimal dilutions for microbiological examination - Part 1: General rules for the preparation of the initial suspension and decimal dilutions (I