The GB/T 9758.3-1988 is a Chinese national standard that specifies the determination method of "soluble" barium content in Paints and varnishes, using flame atomic emission spectroscopy (AES) method. The standard is applicable to Paints with barium content in the range of 0.05% to 5% (mass ratio), and provides detailed experimental procedures and technical requirements to ensure the accuracy and reliability of the determination results. The implementation of the standard helps to monitor the barium content in Coating products, ensure product safety and environment friendliness, and promote the healthy development of the Coating industry. The standard is under the jurisdiction of the National Coating and Pigment Standardization Technical Committee, and the competent authority is the China Petroleum and Chemical Industry Federation.