Photoelectric Colorimeter

Photoelectric colorimeters are instruments used in chemical analysis to measure the concentration of a substance in a solution based on its color intensity. They belong to the supply class of Chemical Analysis Instruments, which includes various instruments used for qualitative and quantitative analysis of chemical substances.

Photoelectric colorimeters work on the principle of Beer-Lambert law, which states that the absorbance of light by a solution is directly proportional to the concentration of the absorbing substance. These instruments consist of a light source, a sample holder, a filter or monochromator to select a specific wavelength of light, and a photodetector to measure the intensity of transmitted or reflected light.

To use a photoelectric colorimeter, a sample solution is placed in the sample holder, and the instrument is calibrated using a blank solution with no analyte. The instrument then measures the intensity of light transmitted through the sample at a specific wavelength. The measured intensity is compared to a calibration curve or standard curve to determine the concentration of the analyte in the sample.

Photoelectric colorimeters are widely used in various fields such as chemistry, biochemistry, environmental science, and food analysis. They are essential tools for quantitative analysis, quality control, and research purposes in laboratories and industries.

In summary, photoelectric colorimeters are instruments used in chemical analysis to measure the concentration of a substance in a solution based on its color intensity. They are part of the supply class of Chemical Analysis Instruments in the supply group Instruments And Laboratory Equipment.