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prEN ISO 24223 Viešoji apklausa

Komentavimo iki data 2026-02-03

Pienas ir pieno gaminiai. Ėminių paruošimo fizikiniams ir cheminiams tyrimams nurodymai (ISO/DIS 24223:2025)

This document gives guidance on the sample preparation of milk and milk products for physical and chemical analysis, including analysis by applying instrumental methods. This document describes the (sub)sampling, and sample preparation steps carried out after sampling according to ISO 707 | IDF 50 (1) and prior to method-specific sample preparations, e.g. as with analytical methods listed in References (2) to (21). NOTE Analysis on volatile substances, minor components or allergens can require additional precautionary measures in sample preparation in order to avoid loss of or contamination with one or more target analytes.

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prEN ISO 29981 Viešoji apklausa

Komentavimo iki data 2026-01-27

Pieno gaminiai. Bifidobakterijų skaičiavimas. Kolonijų skaičiavimo būdas (ISO 29981:2024)

This document specifies a method for the selective enumeration of bifidobacteria in milk products by using a colony-count technique at 37 °C under anaerobic conditions. The method is applicable to milk products, such as fermented (e.g. yoghurts) and non-fermented milks (e.g. pasteurized milks, skim milks, whey protein concentrates), milk powders and formulae (e.g. infant formulae, follow-up formulae for older infants, products for young children) where these microorganisms are present and viable, in combination with other lactic acid bacteria or alone. The method is also applicable to starter and probiotic cultures. For proposed quality criteria of dairy products, see, for example, CXS 243-2003. Bifidobacteria used in milk products usually belong to the following species (e.g. References [7] and [10]): — Bifidobacterium adolescentis; — B. animalis subsp. animalis; — B. animalis subsp. lactis; — B. bifidum; — B. breve; — B. longum subsp. infantis; — B. longum subsp. longum.

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