Surfactant Testing and Analysis
Surfactants have a series of physical and chemical functions such as wetting or anti-adhesion, emulsification or demulsification, foaming or defoaming, solubilization, dispersion, washing, anticorrosion, antistatic etc. and corresponding practical applications, and become a kind of flexible and widely used fine chemical products. In addition to being used as detergents in daily life, surfactants can cover almost all fine chemical fields in other applications. In scientific research and practical production, surfactants are often analyzed and tested to determine their type, content and structure. As a professional reliability third-party testing organization, T,C&A Lab can provide Surfactant Testing and Analysis service according to ISO, ASTM standards and industry requirements. Welcome to contact our experts for consultation.
The surfactants we can test include:
- Anionic surfactants: Stearic acid, sodium dodecylbenzene sulfonate
- Cationic surfactants: Quaternary ammonium compounds
- Zwitterionic surfactants: Lecithin, amino acid type, betaine type
- Nonionic surfactants: Alkyl glucoside (APG), fatty acid glycerides, fatty acid sorbitan, polysorbate (Tween)
Some testing items of surfactants:
- Basic performance testing of surfactants
- Determination of foaming power
- Measurement of surface tension and interfacial tension
- Determination of critical micelle concentration
- Determination of HLB value
- Qualitative analysis of surfactants
- Identification of ion types
- Chemical analysis of functional groups
- Quantitative analysis of surfactants
- Quantitative analysis of nonionic surfactants
- Quantitative analysis of anionic surfactants
- Quantitative analysis of cationic surfactants
- Quantitative analysis of amphoteric surfactants
- Other testing items
- Free alkalinity
- Iodine value
- Saponification value
Surfactant Analysis Techniques:
- Gas chromatography (GC)
- Thin layer chromatography (TLC)
- High performance liquid chromatography (HPLC)
- Supercritical fluid chromatography
Chromatography is widely used in the analysis, separation and identification of organic compounds and mixtures. Its biggest feature is that it can separate and detect the various components in a complex mixture. Chromatography methods commonly used for surfactant detection include:
Spectroscopy can be used to determine the molecular structure and molecular types of surfactants, including:
- Mass Spectrometry
- Structure identification
- Molecular weight determination
- Molecular structure determination
- Capillary electrophoresis
- Surfactant concentration determination
- CMC value determination
- Electrochemical method
- Conductivity method: Conductivity method is often used to determine the CMC value of surfactants.
- Potentiometric method: Surfactants have ionic groups or polar groups, and the ionized ions in the solution can be measured with an ion selective electrode.
- Chromatography-mass spectrometry technology
- Gas chromatography-mass spectrometry (GC-MS) – Identification and analysis of sulfonic acid surfactants.
- High performance liquid chromatography-mass spectrometry (HPLC-MS) – Used to determine the effective content, molecular weight and degree of polymerization of surfactants and to analyze a variety of surfactants in unknown samples.
- Other mass spectrometry methods – Matrix-assisted laser desorption ionization-Fourier transform ion cyclotron resonance mass spectrometry, electrospray ionization mass spectrometry (ESI/MS), capillary supercritical fluid chromatography coupled with chemical ionization mass spectrometry (SFC-CI/MS).
Standards we test to
- ASTM D6173, ASTM D2357, ASTM D2358
- ISO/DTS 21680, ISO 7875, ISO/CD TR 21681, ISO 6810, ISO 17280, ISO 17293, ISO 16560, ISO 19619, ISO 21264
In addition, the experts in our Surfactant Testing and Analysis Laboratory also provide a variety of custom services as your needs and requirements. Let's discuss the custom services with our experts for free.
Note: this service is for Research Use Only and Not intended for clinical use.