The AFNOR (Association française de normalisation) is a French standardization organization. It represents France at the ISO and CEN. The following testing standards published by this organization are particularly relevant.
Water quality - Sampling for microbiological analysis (ISO 19458:2006)
Water quality - Determination of pH
Testing of water: determination of the chemical oxygen demand
Stationary source emissions - Determination of ammonia (NH3)
Solid biofuels - Determination of the content of volatile matter
Plastics - Determination of tensile properties - Part 3 : test conditions for films and sheets