FIELD: measurement technology.
SUBSTANCE: invention relates to determination of number of different substances in a liquid sample. Device contains at least one optical analysis method, not depending on volume and/or concentration, for determination of one of following properties: hydrogen potential pH, amount of chloride and/or amount of iron in sample. Optical property may be examined, fluorescent, or both, wherein it can be a result of adding into sample dyes, complexing agents, compounds, causing turbidity, and other reagents, causing optical effect. Method also involves use of BDD electrode for oxidation of substances (such as sulphoxide compounds), which otherwise would hinder optical analysis, and/or for washing sample gas.
EFFECT: measurements can be carried out continuously, quickly, thereby avoiding inconvenience to beginning and termination of process, and device can be reused with such samples of very hard water, as water of settler of refinery.
15 cl, 11 dwg
