UV254 and %UVT

UV254 is the absorbance of light at 254nm, a typical parameter used in water treatment to determine the amount of dissolved organic carbon (DOC) present in real time. It is also sometimes called UVA (UV Absorbance).

Many organics in raw water, such as humic substances, are aromatic and exist in relatively high concentrations. Such organics are known to be a precursor of disinfection by products (DBP). UV254 therefore provides one of the best indicators to whether organics are being removed throughout a water treatment process.

The reciprocal measurement of UV254 is %UVT. This is the same measurement but expresses the result as a in terms of how much light is transmitted through the sample relative to pure water.

PMA supplies UV254 standards of any value.

We can also supply UV254 Standards with your branding, full QC traceability, bespoke MSDS’, and C of A’s. See our manufacturing capabilities for more information or get in touch below.

Products for this application

We have a wide range of products, designed to suit everyone.

We supply off the shelf reagents for the following instruments.

Particle element
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s::can spectro::lyser

An advanced online UV-Vis spectrophotometer for measuring multiple parameters simultaneously.

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Particle element
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s::can UV::lyser

A specialised online sensor for measuring multiple UV wavelengths

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s::can i::scan

A compact UV254 and %UVT sensor for network monitoring, drinking water treatment works and wastewater treatment.

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Compass coagulation control system

A coagulation control system utilising differential UV-Vis spectroscopy for advanced NOM characterisation in real-time.

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Particle element

Whitelabel solutions

We can also supply UV254 Reagents for your instruments, to your formulation, with your branding, full traceability, bespoke MSDS’, and C of A’s. See our manufacturing capabilities for more information or get in touch below.

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