EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 4311 testing. The method is carried out as follows: Determine the surface tension of a set of solutions whose concentrations support the critical micelization concentration, plot the surface tension as a function of the logarithm of the concentration, the critical micellarization concentration corresponds to a singular point on this curve. At this point the curve shows a sharp slope change.
Curves showing the change in physical properties of aqueous solutions of surfactants are specific to individual products; In a given concentration region, which is usually very narrow, these curves show a sharp slope change. This phenomenon has been attributed to the formation of oriented clusters of molecules, and the concentration at which this change occurred was termed the "critical micelization concentration".
For a given hydrophobic chain length, the critical micelization concentration is generally higher in the case of ionic surfactants than in the case of nonionic surfactants. Apart from the nature, temperature and presence of surfactant, the nature and amount of metallic salts, organic compounds cause the critical micelization concentration to vary and therefore operating conditions that are likely to affect the result should be clearly stated.
This method is applicable to purified or non-purified nonionic surfactants that are water-soluble and have a cloud temperature at least 5°C above the test temperature, and to purified or non-purified anionic surfactants that are water-soluble and have Krafft. the temperature is at least 5°C below the test temperature.
EUROLAB assists manufacturers with ISO 4311 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK) ve Enterprise Accreditation Foundation (EAF) based on the accreditation provided by the accreditation body. The Enterprise Accreditation Foundation (EAF) accreditation body is also a signatory of the United Nations (UN GLOBAL COMPACT) organization.
