Laserdiffractionmittauksilla

Laserdiffractionmittauksilla, or laser diffraction analysis, is a widely used technique in particle size analysis. It involves the use of laser light to measure the size distribution of particles in a sample. The principle behind the technique is based on the diffraction of light when it passes through or around particles. The diffraction pattern created by the particles is then analyzed to determine their size distribution.

The laser diffraction method is particularly useful for measuring the size of particles in the range of 0.01 to 3500 micrometers. It is a non-destructive technique, meaning that the sample remains intact after the measurement. This makes it suitable for a wide range of materials, including powders, suspensions, and emulsions.

The process begins with the dispersion of the sample in a suitable liquid medium. The dispersed sample is then illuminated with a laser beam. The light diffracted by the particles is collected and focused onto a detector, typically a photodiode array. The intensity of the diffracted light at different angles is measured and used to calculate the size distribution of the particles.

One of the key advantages of laser diffraction analysis is its ability to provide a rapid and accurate measurement of particle size distribution. It is also relatively inexpensive and easy to use, making it a popular choice in various industries, including pharmaceuticals, food and beverage, and materials science. However, it is important to note that the accuracy of the results can be affected by factors such as the refractive index of the particles and the medium, as well as the shape and surface texture of the particles. Therefore, proper sample preparation and calibration are crucial for obtaining reliable results.