In order to increase mass and heat transfer between gases and liquids, random packings and structured packings are used in absorption columns. Considering that new packings are being developed continuously, it is crucial to measure and determine their effectiveness. This can be done by using absorption of ammonia from air by water with a certain amount of random and structured packings and determining the absorption rates. The reason for choosing ammonia as the mass transfer medium in the tests lies in its high solubility in water. Apart from that, analysing the liquid plays also an important part to find the values of HTU and NTU, which are the units used for measurement. The present master thesis deals with finding the best method to detect ammonia in the liquid phase. Two possible ways of analyzing the liquid were tried: firstly, titration using sodium hydroxide solution and secondly, a photometric approach using Macherey-Nagel´s Nanocolor® rapid test. Comparing the findings of the two approaches shows that applying the volumetric method to determine the amount of ammonia in tap water brings certain difficulties with it because water components, particularly carbon dioxide, influence the measurements. Carbon dioxide stripping with nitrogen as stripping agent proved to be effective but rather time-consuming. The photometric approach using the quick test, on the other hand, was found to be as effective and precise but needed less time.