An emulsifier is a chemical that can evenly mix two heterogeneous solutions, such as oil and water, to form an emulsion. Emulsifiers are divided into anionic, cationic, non-ionic and amphoteric types, and their mechanism of action is mainly to form a film on the oil-water interface through molecular structure, thereby reducing the tension of the oil-water interface, so that the oil and water can disperse each other and form a stable emulsion. Emulsifiers are widely used in cosmetics, medicine, pesticides, coatings, food, petroleum and other fields to achieve a variety of functions and performance improvement.

Detection performance
The following are the main properties and detection methods of common emulsifiers, as shown in the following table:

Key performance test of emulsifier and method thereof

We reminds you: different emulsifier types have different performance and detection methods, so it is necessary to choose the appropriate detection method according to the actual situation in the specific detection.

Key performance test of emulsifier and method thereof

Specific detection method
The specific emulsifier detection method is as follows:

Appearance detection: directly observe the appearance of the sample, such as whether there is color, foreign matter, etc.

Density and specific gravity detection: Use a densitometer or hydrometer to measure the density or specific gravity of a sample.

Refractive index detection: The refractive index of a sample is measured using a refractometer to assess its physical properties.

Solubility testing: The solubility of a sample in a specific solvent is observed to assess its chemical properties.

Toxicity testing: Acute toxicity testing is performed to assess its safety.

pH test: Use acid-base titration or pH meter method to measure the pH value of the sample.

Residue detection: Use ash method or drying method to measure the residue content of the sample.

Emulsifying ability test: shock test, centrifugal test, specific gravity test, optical microscope observation and other methods to evaluate its emulsifying performance.

Dispersion performance test: centrifugal test, dynamic light scattering analysis and other methods to evaluate the dispersion performance.

Key performance test of emulsifier and method thereof

Stability test: thermal stability test, cold stability test, salt stability test, pH stability test and other methods to evaluate its stability performance.

Conductivity detection: The conductivity of a sample is measured using an conductivity meter.

Viscosity detection: Use a viscometer to measure the viscosity of a sample.

North and South tide reminds you: different emulsifiers may require different detection methods, which should be selected according to the actual situation. At the same time, attention should be paid to the selection of appropriate instruments and equipment during testing, and operation should be carried out in accordance with standard operating procedures to ensure the accuracy and reliability of the test results.