Description of the method
UV-Vis-(NIR) spectrophotometers measure the absorption, transmission and reflection properties of solutions or solids (transparent samples, or thin films/layers). This involves using light in the ultraviolet (100–380 nm), visible (380–780 nm) and near-infrared (780–3000 nm) regions. Using models, a wide variety of material parameters can be calculated from this data, which can be used, amongst other things, for quality control.
Application examples
- Purity testing
- Identification and quantification
- Determination of the thickness of thin (0.1 µm – several µm) or transparent layers
- Determination of colour tones/turbidity/UV resistance of filters, colour coatings, films, mirrors, etc.
- Determination of the amount of light absorbed
- Relative absorption of two signals
- Determination of reaction kinetics