This standard describes a method for the determination of acid and alkali milligram equivalents in Electrophoresis tanks. This test is used to assess the concentration of acidic and alkaline components in Electrophoresis tanks to aid in research, production and process control. The standard covers the determination of acid and alkali content in anode and cathode Electrophoresis baths and their ultrafiltrates. It is suitable for quality control of Electrophoresis baths. The standard does not cover all safety issues. Users need to establish appropriate safety, health and environment practices and comply with relevant regulations.