Microbiology of the food chain - Specific requirements and guidance for proficiency testing by interlaboratory comparison (ISO 22117:2019); German version EN ISO 22117:2019
Edition 2019-08

Soil quality - Determination of polycyclic aromatic hydrocarbons (PAH) - Gas chromatographic method with mass spectrometric detection (GC-MS) (ISO 18287:2006)
Edition 2006-05

Vinegar - Isotopic analysis of acetic acid and water - Part 3: ¹⁸O-IRMS analysis of water in wine vinegar; German version EN 16466-3:2013
Edition 2013-03

Tea - Determination of theaflavins in black tea - Method using high performance liquid chromatography (ISO 18447:2021)
Edition 2023-01

Algae and algae products or intermediates - Methods of sampling and analysis - Determination of chlorophyll a content; German and English version prEN 18034:2023
Edition 2023-12

Plant biostimulants - Claims - Part 5: Determination of availability of confined nutrients in the soil or rhizosphere; German and English version prEN 17700-5:2023
Edition 2023-04

Heating and cooling systems in buildings - Installation and commissioning of water based heating and cooling systems; German and English version prEN 14336:2024
Edition 2024-04

Heat treatment of ferrous materials - Methods of heat treatment - Part 1: Hardening, austempering, annealing, quenching, tempering of components
Edition 1994-10

Algae and algae products - Methods of sampling and analysis - Determination of total lipids content using the Ryckebosch-Foubert method; German version EN 17908:2023
Edition 2024-02

Thermal insulating products for building applications - Determination of squareness; German version EN 824:2013
Edition 2013-05