Measurement of Particulates in the Air by Laser Scattering (CAT#: STEM-ST-0167-YJL)

Introduction

It is well known that the negative effects on human health besides climate implica-tions, within the context of the phenomenon of atmospheric pollution, of fine dusts (PM 10, PM 2.5) constitute a priority. However, for the purposes of a proper action of preservation and of prevention with regard to exposed cultural property and the interaction of the aforesaid dusts with these artefacts, it is opportune to note how such action of alteration/degradation could also occur within confined spaces, such as museums, libraries and archives. Particularly, the presence of a high quantity of dusts within the area where frescoes, paintings, sculptures and works of art in general are situated, should be readily surveyed to allow the prevention of any dangerous situation.

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Principle Applications Procedure Materials Notes Related Products

Principle

Laser scattering method is a commonly used material detection method, which uses a laser beam to irradiate the sample, and analyzes the physical and chemical properties of the sample by detecting the intensity and direction of the scattered light from the sample. This method has the advantages of non-contact, high sensitivity, and high resolution, and is widely used in materials science, biomedicine, and environmental monitoring.
The detection principle of the laser scattering method is based on the scattering phenomenon of light. When the laser beam hits the surface of the sample, part of the light will be scattered in all directions, forming scattered light. The intensity and direction of these scattered light are related to the physical and chemical properties of the sample, so the properties of the sample can be analyzed by detecting the characteristics of the scattered light.

Applications

Laser light scattering (LLS) is used to determine size of various particles including proteins, polymers, micelles and nanoparticles.

Procedure

1. Sample preparation
2. Measurement by scattering detection instrument
3. Data analysis

Materials

Laser Light Scattering Instrument

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