Difference Between Chronometer and Colorimeter

Difference Between Chronometer and Colorimeter

Chronometer principle:
When monochromatic light passes through a solution of the same thickness and a small concentration, according to Lambert-Beer's law, the extent to which light is absorbed by the solution is called absorbance, which is proportional to the concentration of the solution and proportional to the thickness of the solution, ie A = εCL, where A is the absorbance, C is the concentration of the solution, L is the thickness of the solution, and ε is the extinction coefficient.
According to Lambert-Beer's law, when a bundle of monochromatic light passes through a solution, the intensity of the light is attenuated because the solution absorbs a portion of the light energy. If the concentration (or thickness) of the solution is constant, then the larger the thickness (concentration) of the solution, the more obvious the weakening of the light intensity.
There are two commonly used colorimetric methods: visual colorimetry and photoelectric colorimetry. The former is observed with the eye and the latter is measured with a photoelectric colorimeter. Both methods are based on Lambert-Beer law (see UV-visible spectrophotometry).

Principle of Colorimeter:
Being widely used in plastics and printing industries, it is mainly based on the Lab, Lch principle of CIE color space, measuring the color difference △E and △Lab of the sample and the sample to be tested
Correlated analysis method
△E total color difference
△L+ means partial white, △L- means partial black
△a+ means reddish, △a- means greenish
△b+ means yellowish, △b- means bluish
The Lovibond colorimeter is often mistakenly called a colorimeter. Although these two test instruments do have a lot in common, that is, in terms of basic functions. But in fact, the two have different working principles. The Lovibond colorimeter is used to perform colorimetric analysis to determine the amount of known material from color, in a specific reagent yield.
Related News
  • Selection and Purchase of Spectrophotometers (2)

    Selection and Purchase of Spectrophotometers (2)

    May 14, 2019When we buy spectrophotometers, we need to consider the following aspects:5. Slit: Simple slit is generally fixed width mode, slit width is mostly 2 nm, but also 1.5 nm; The slits of high-grade instru...view
  • Spectrophotometric Analysis Method Of Mercury In Cosmetics

    Spectrophotometric Analysis Method Of Mercury In Cosmetics

    August 21, 2018Mercury added in the cosmetics not only be regarded as a preservative, but also has the function of quick whitening. Since mercury is prohibited in cosmetics all over the world, no one has studied how...view
  • Common Faults and Countermeasures of Handheld Brinell hardness tester

    Common Faults and Countermeasures of Handheld Brinell hardness tester

    January 9, 20191. Causes and troubleshooting methods of the failure of Brinell hardness tester caused by load error exceeding (+1.0%) or instability: (1) If the force point blade is loose, the force point blade shou...view
  • Light Transmittance Meter

    Light Transmittance Meter

    May 14, 2019Advantages of light transmittance meter1. Parallel optical path design is used to measure material with large thickness.2. The split probe is equipped with a fixed bracket, and has both fixed and spli...view