“…In addition, the "sub-commodity water" may be enriched with benzene groups, and therefore the concentration of dissolved PPs determined by traditional methods may differ significantly from the total concentration of petroleum organic substances contained in the water, since the solubility of benzene-like compounds in water, as noted earlier, is much higher than that of classical PPs. Therefore, it is advisable to use oxidative methods to determine the concentration of PPs in such waters [9,10]. Conclusions 1.…”