ASTM International

Standard Test Method for Dynamic Surface Tension by the Fast-Bubble Technique
 N D3825

Annotation

This test method covers the determination of the specific free energy of a liquid-gas surface a short time after formation of the surface.

It is applicable to liquids with vapor pressures up to 30.0 kPa (225 torr) and kinematic viscosities up to 4.0 mm/s (4.0 cSt) at the test temperature. Higher viscosities have not yet been investigated.2

The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

Warning—Mercury has been designated by EPA and many state agencies as a hazardous material that can cause central nervous system, kidney, and liver damage. Mercury, or its vapor, may be hazardous to health and corrosive to materials. Caution should be taken when handling mercury and mercury-containing products. See the applicable product Material Safety Data Sheet (MSDS) for details and EPA's website (http://www.epa.gov/mercury/faq.htm) for additional information. Users should be aware that selling mercury or mercurycontaining products, or both, in your state may be prohibited by state law.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see 7.3, 7.4, and 7.5.

2 Kloubek, J., "Measurement of the Dynamic Surface Tension by the Maximum Bubble Pressure Method, III," Journal of Colloid and Interface Science, Vol. 41, October 1972, pp. 7–16.