GB/T 6541-1986 "Petroleum products--Mineral oils--Determination of interfacial tension of oil against water--Ring method"

This standard specifies a method for determining the interfacial tension of petroleum product oils to water by the ring method. Interfacial tension refers to the tension at the interface between liquids and liquids. The ring method evaluates the interfacial properties of petroleum products by measuring the force of the oil film on the water surface. The standard covers the test procedures, equipment and calculation methods and provides detailed guidance to ensure measurement accuracy.

This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.