UV254 - Absorbance at 254 nm

UV254 - Absorbance at 254 nm

It is a test method performed to determine UV absorption at 254 nm in spring and drinking water. The absorbance at a wavelength can be linearly proportional to the concentration of any substance in water as it absorbs light of a particular wavelength. For this reason, absorbance measurements are common in laboratory and field studies. The measurement process is as follows:

• Ultraviolet light with a wavelength of 254 nm is passed through a quartz cell containing the sample.
• The intensity of the attenuated light is measured by the sensor.
• Before calculating the logarithm, divide by the measurement of pure water.
• The measurement is determined as absorbance per path length.

It is an important parameter for measurement throughout the drinking water treatment process. It can be used to determine the concentration of organic substances, especially those containing aromatic rings or unsaturated bonds in their structures.