Norm

ASTM D2024-09

Standard Test Method for Cloud Point of Nonionic Surfactants

48,24

Over deze norm

Status Definitief
Aantal pagina's 2
Commissie D12.15
Gepubliceerd op 01-10-2009
Taal Engels

1.1 This test method covers a procedure to determine the cloud point of nonionic surfactants or detergent systems. Cloud Point is the temperature at which dissolved components (solids or liquids) are no longer completely soluble, precipating as a second phase giving the fluid a cloudy appearance. It is limited to those surfactants and detergent systems for which the visible solubility change occurs over a range of 1°C or less at concentrations of 0.5 to 1.0 % in DI water between 30 and 95°C.

1.2 Chemical LimitationsNonionic surfactants that exhibit a characteristic cloud point in general terms consist of a water-in-soluble moiety condensed with 50 to 75 % by weight of ethylene oxide. If the level of ethoxylation is too low the surfactant may not be water soluble at temperatures less than 30°C, and if it is too high no cloud point may exist.

1.3 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Details

ICS-code 71.100.40
Nederlandse titel Standard Test Method for Cloud Point of Nonionic Surfactants
Engelse titel Standard Test Method for Cloud Point of Nonionic Surfactants

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