October 18, 2025
Quartz cuvette is an optical instrument that uses a quartz cuvette to measure the concentration of a colored solution. It works by passing a beam of light through the solution and measuring how much light is absorbed, based on the Beer-Lambert Law. The device consists of a light source, a filter to select a specific wavelength, a quartz cuvette to hold the sample, a photodetector, and a display. Quartz is used for the cuvette because it is transparent to a wide range of wavelengths, including deep UV, and is resistant to many solvents and high temperatures.
How it works：
1. Light source: A stable light source, often a tungsten filament lamp, generates a beam of light.
2.Wavelength selection: A filter or a monochromator selects a specific wavelength of light that is absorbed by the solution.
3.Sample and cuvette: A solution of a known or unknown concentration is placed in a quartz cuvette. Quartz cuvettes are used because of their transparency and chemical resistance.
4.Light absorption: The light passes through the cuvette and the colored solution. The solution absorbs some of the light, while the rest passes through.
5.Detection: A photodetector measures the intensity of the light that passes through the solution. This intensity is compared to the intensity of the original light beam.
6. Calculation: According to the Beer-Lambert Law, the amount of light absorbed is proportional to the concentration of the solution. The colorimeter calculates the concentration based on this principle.
