Color spectrophotometry uses a light source to illuminate a sample with light across the UV to the visible wavelength range (typically 190 to 900 nm). The instruments then measure the light absorbed, transmitted, or reflected by the sample at each wavelength. Some color spectrophotometry has an extended wavelength range, into the near-infrared (NIR) (800 to …
Biochemical analyzer (BCA) is an analytical instrument used to measure various biochemical indicators of human blood. It can provide doctors and chemical laboratory personnel with testing data accurately and quickly, and plays an important role in monitoring bed diagnosis and chemical testing. The colorimeter is the core component of the biochemical analyzer. In traditional colorimeters, …
Working principle Light from a LED light source passes through a cuvette containing a solution sample, as shown in the following picture. Some of the incoming light is absorbed by the solution. As a result, the light of a lower intensity strikes a photodiode. Transmittance and Absorbance The amount of light that passes through a …
When it comes to colorimeters, let’s first introduce photometry. Photometry is the general name given to the techniques which use the detection of light radiation and changes in radiation intensity. If the measured light is in the visible range of the electromagnetic spectrum, then the term applied to the analysis is colorimetry. The basis of …
