Method of seawater sampling for dissolved oxygen measurement (introduction)

　 If the rate of organic matter decomposition (oxygen consumption rate) in seawater is given, the movement rate of water masses can be calculated from the spatial distribution of AOU. Since it is necessary to detect extremely small differences in AOU, the measurement of dissolved oxygen concentration requires precision. Measure dissolved oxygen with extreme caution. Etiquette for oxygen measurement differs depending on the research institution, but I will introduce a slightly looser method below.