Colorimetry is the science of measuring and quantifying color. It plays a crucial role in various fields, including chemistry, food technology, and environmental science, where accurate color measurement is essential for quality control and analysis.
Principles of Colorimetry
Colorimetry is based on the principle that color can be described in terms of light absorption and transmission. The perception of color is determined by the wavelength of light that is absorbed by a substance and the wavelengths that are transmitted or reflected.
Types of Colorimetric Methods
Applications of Colorimetry
Instrumentation
Common instruments used in colorimetry include:
Example Substances and Color Values:
Cobalt(II) Chloride Solution
Color Value: Blue
A typical cobalt(II) chloride solution appears blue due to the absorption of specific wavelengths of light.
Bromothymol Blue
Color Value: Yellow to Blue (pH-dependent)
Bromothymol blue is a pH indicator that changes color from yellow in acidic conditions to blue in basic conditions.