Within the scope of the National Environmental Methods Index (NEMI), the SM 4500-Cl C method, which includes the mercury nitrate method for chloride determination, has been developed.
Chlorine, in the form of chloride ions, is one of the major inorganic anions in water and wastewater. The salty taste produced by chlorine concentrations is variable and depends on the chemical composition of the water. Some waters containing 250 mg of Cl/L may have a detectable salty taste if the cation sodium. On the other hand, waters containing up to 1000 mg/L may not have the typical salty taste when the predominant cations are calcium and magnesium.
The chloride concentration in wastewater is higher than in raw water because sodium chloride is a common dietary substance and passes through the digestive tract unchanged. Along the seashore, chloride can be found in high concentrations due to brine seeping into the sewer system. It can also be increased by industrial processes.
High chlorine content can damage metal pipes and structures as well as growing plants.
Six methods for the determination of chloride are presented in this standard. Of these, the endpoint of the mercury nitrate method is easier to determine. Method using mercury, a highly toxic reagentrequires special disposal practices to prevent inappropriate sewage discharges.
In the tests and analyzes carried out in our organization, which has a wide range of technological equipment, trained and experienced staff and applies the most modern methods, national and international standards and legal regulations in force are complied with. Among the numerous tests performed in this context, there are mercury nitrate determination (SM 4500-Cl C method) services.