Bromine is an element which is poisonous and caustic and smells very bad. It is not free in nature. It is mostly found in nature in the form of sodium, potassium and magnesium bromides. Bromine is obtained by oxidation of bromides in sea water with chlorine. Also, the gaseous hydrobrormic acid obtained by reacting solid sodium bromide with sulfuric acid is also oxidized with sulfuric acid.

Water-soluble metal bromides are used in the production of sleep medicines, light-sensitive silver bromide is used in photography. Alkyl bromides are used as antiseptics and solvents. Bromine is involved in the structure of many chemical compounds in the industry. For example, bromine is present in the structure of water treatment compounds, bleaches, various drugs and flame retardant chemicals. Organic compounds are also good solvents.

When it was discovered in 1826, it was called bromos from the word bromos, which means fecal smell in Greek. It is a dark red liquid under normal conditions.

Bromine compounds are widely used in laboratories and industry. Since it has an electronegative structure, bromine easily forms salt with electropositive elements. It is present in nature as the salts of alkali and alkaline earth metals.

During disinfection of drinking and utility water, ozonation produces a carcinogenic bromate ion. Bromate occurs when ozonated water contains bromine ions. Therefore, bromine and bromate analyzes are very important. Bromine in drinking and utility water is generally determined by electrophoresis and ion chromatography methods of bromate.

Determination of bromine in potable and potable water is carried out in authorized laboratories within the scope of chemical tests. Many different methods are used in these studies. The most commonly used technique is electrophoresis and ion chromatography. The determination of bromine is based on the standards issued by domestic and foreign institutions.