ISO/TS 27265 | IDF/RM 228: 2026 - Heat-processed milk and dried milk products — Enumeration of thermoresistant spores of thermophilic bacteria

This document specifies methods for the enumeration of thermoresistant spores of thermophilic bacteria in heat-processed milk and dried milk products by using a colony count technique at 55 °C after heating the sample at 106 °C or 100 °C. The applicability of this document is limited to heat-processed milk including pasteurized, ultra-high temperature (UHT) processed and sterilized milk; as well as dried whole milk, skim milk, buttermilk and whey products. This second edition cancels and replaces ISO/TS 27265 | IDF/RM 228: 2009