HY/T 178-2014 《Determination of alkalinity in seawater using pH potentiometric titration》 Related products

The standard specifies a method for determining the alkalinity of seawater during seawater utilization, using the Titrimetric method of pH potential, and is suitable for the determination of alkalinity in seawater, brackish water and saline water in the range of 0 to 4 mmol/L. Reference documents include chemical reagent preparations, laboratory water specifications and test methods, and relevant standards for laboratory Glass instruments. Term definitions include alkalinity, phenolphthalein alkalinity, and methyl orange alkalinity. The determination principle is acid-base Titrimetric method, using muriatic acid standard titration solution as titrant, and the endpoint is determined by pH Meter potential indication. At pH = 8.3, titrated hydroxide and carbonic acid salts; at pH = 4.5, titrated carbonic acid hydrogen ion.