Spektralfotometeret

Spektralfotometeret, also known as a spectrophotometer, is an analytical instrument used to measure the intensity of light absorbed or transmitted by a sample as a function of its wavelength. This device is widely used in various fields, including chemistry, biology, and materials science, for quantitative analysis and quality control.

The spectrophotometer operates on the principle of Beer-Lambert Law, which states that the absorbance of light by a sample is directly proportional to the concentration of the absorbing species in the sample and the path length of the light through the sample. By measuring the absorbance at different wavelengths, the spectrophotometer can provide information about the composition and concentration of the sample.

The instrument typically consists of a light source, a monochromator to select specific wavelengths, a sample holder, and a detector to measure the intensity of the transmitted or absorbed light. Modern spectrophotometers often include additional features such as automatic sample changers, data logging, and software for data analysis and reporting.

Spectrophotometers are available in various types, including UV-Vis spectrophotometers for measuring light in the ultraviolet and visible regions, infrared spectrophotometers for measuring infrared light, and fluorescence spectrophotometers for measuring fluorescence emission. Each type is suited for different applications and sample types.

In summary, the spektralfotometeret is a versatile and essential tool in analytical chemistry and related disciplines, enabling precise and accurate measurements of light absorption and transmission across different wavelengths. Its applications range from routine laboratory analysis to advanced research and quality control processes.