2000GB/T 3050-2000 Inorganic chemical products for industrial use-General method for determination of chloride content-Potentiometric method
1982GB 3050-1982 General method for the determination of chloride content in inorganic chemical products by potentiometric titration
GB 3050-1982 General method for the determination of chloride content in inorganic chemical products by potentiometric titration was changed to GB/T 3050-2000 Inorganic chemical products for industrial use-General method for determination of chloride content-Potentiometric method.