What are colorimetric methods?

Colorimetric analysis is a method of determining the concentration of a chemical element or chemical compound in a solution with the aid of a color reagent. It is applicable to both organic compounds and inorganic compounds and may be used with or without an enzymatic stage.

What is the principle of colorimetric method?

Principle of Colorimeter is that coloured compounds can absorb a certain wavelength of light when monochromatic light is passed through them. The working of a colorimeter is based on the concept of Beer-Lambert’s law.

What is colorimeter used for?

A colorimeter is an instrument that compares the amount of light getting through a solution with the amount that can get through a sample of pure solvent. A colorimeter contains a photocell which is able to detect the amount of light passing through the solution under investigation.

Why is colorimetry used?

colorimetry, measurement of the wavelength and the intensity of electromagnetic radiation in the visible region of the spectrum. It is used extensively for identification and determination of concentrations of substances that absorb light.

What is the application of colorimeter?

Colorimeters are used for a wide variety of applications in the chemical and biological fields including, but not limited to, analysis of blood, water, soil nutrients and foodstuffs, determination of solution concentration, determination of reaction levels, determination of bacterial crop growth.

What is the function of colorimeter?

What is the unit of colorimeter?

Colorimeters generally measure transmittance (a linear scale from 0-100%) as well as absorbance (a logarithmic scale from zero to infinity). The displayed value, however, is usually either mg/L or ppm which are calculated from measured values.

What are the components of colorimeter?

The essential parts of a colorimeter are:

  • a light source (often an ordinary low-voltage filament lamp);
  • an adjustable aperture;
  • a set of colored filters;
  • a cuvette to hold the working solution;
  • a detector (usually a photoresistor) to measure the transmitted light;
  • a meter to display the output from the detector.

Where is colorimeter used?

What are the benefits of using a colorimeter?

Compared with other methods, the colorimetric method has some obvious advantages, such as low cost, simple instruments (or, in the case of naked eye detection, no instruments), and can be qualitatively or semiqualitatively identified by the naked eye. However, colorimetry is generally less sensitive.