Konteksts: [..] If the viscosity of the suspension increases so that it becomes too thick or viscous to mix well or pipette, add a further equal volume of peptone salt solution to produce a 1 in 20 initial suspension. [..]
Avots: Microbiology of food and animal feeding stuffs - Preparation of test samples, initial suspension and decimal dilutions for microbiological examination - Part 4: Specific rules for the preparation of products other than milk and milk products, meat and meat products, and fish and fishery products (ISO 68874:2003)