Determination of ammonia concentrations in air from livestock housing systems : Reference method using gas washing as applied by Wageningen Livestock Research

This document is elaborated to give a description of the gas washing method as applied by Wageningen Livestock Research (WLR gas washing method). This measurement method is commonly used as the reference method for ammonia concentration measurements for the determination of ammonia emissions from agricultural activities (livestock housing, manure storage, field application of manure). The objective of this document is to specify the performance characteristics of the method, and the procedure for preparation and deployment of this method in practice to measure ammonia concentrations from livestock housing systems