This research investigated the use of two relatively cost-effective devices for determining NH3 concentrations in naturally ventilated (NV) dairy barns including an Ogawa passive sampler (Ogawa) and a passive flux sampler (PFS). These samplers were deployed adjacent to sampling ports of a photoacoustic infrared multigas spectroscope (INNOVA), in a NV dairy barn. A 3-day deployment period was deemed suitable for both passive samplers. The correlations between concentrations determined with the passive samplers and the INNOVA were statistically significant (r = 0.93 for Ogawa and 0.88 for PFS). Compared with reference measurements, Ogawa overestimated NH3 concentrations in the barn by ∼ 14

作者：Xiang, Wang；Pius M, Ndegwa；HungSoo, Joo；George M, Neerackal；Joseph H, Harrison；Claudio O, St?ckle；Heping, Liu

来源：Environmental pollution (Barking, Essex : 1987) 2016 年 208卷 Pt B期