Sri Lanka standard code of practice for preparation of test samples, initial suspension and decimal dilutions for microbiological examination of food and animal feeding stuffs part 1 - general rules for the preparation of the initial suspension and decimal dilutions part 2 - specific rules for the preparation of meat and meat products part 3 - specific rules for the preparation of fish and fishery products part 4 - specific rules for the preparation of products other than milk and milk products, meat and meat products and fish and fishery products part 5 - specific rules for the preparation of milk and milk products part 6 - specific rules for the preparation of samples taken at the primary production stage (Colombo : Sri Lanka Standards Institution, 2013)