Do reagents make a difference in COD testing?

A ripple on the surface of water
Published: 26 July 2023

COD testing is a strict requirement for any UK industry that produces wastewater from various processes. Alongside the instrumentation you use, the reagents you choose can have an impact on the reliability and repeatability of COD testing. Read on now to find out more:

How do COD reagents affect testing?

Both the instrumentation you use and the reagents you utilise for testing need to be as accurate as possible to allow businesses to comply with water utility and ISO requirements. High-quality reagents and a blank that covers the entire lot of tests is an effective way to ensure your results are trustworthy, reducing the cost and time spent on testing.

What are single-use reagents?

Single-use reagents are also known as pre-dosed reagents, and are typically found in powder or liquid vial forms. Pre-dosed reagents from Hanna are available in liquid vials and cover every range starting from 0 to allow businesses to comply with ISO requirements. The range includes comprehensive coverage for low, medium, high and ultra high ranges to meet the needs of a wide range of wastewater applications.

A set of four Hanna COD reagents against a blue background

How Hanna pre-dosed reagents make best practice easy

Hanna pre-dosed reagents are an ideal choice for best practice in COD testing. Some of the benefits of choosing pre-dosed COD vials include:

Reduced health and safety risk

COD reagents contain mercury unless specified otherwise, alongside other harmful chemicals. The design of Hanna reagents provides optimal safety when adding samples to reagents, reducing the risk of spills, droppage or splashing when conducting COD tests.

Improved accuracy for COD testing

Hanna’s COD reagents are extremely accurate in combination with our advanced instrumentation such as the Iris spectrophotometer. Blank samples apply for the whole lot of reagents, supporting repeatability and allowing businesses to take consistently accurate measurements of wastewater to meet water utility compliance requirements.

Less wastage

Pre-dosed vials contain everything needed for COD testing, preventing wastage either through the mixing of reagents or the pouring of powder reagents into a vial. Hanna reagents for COD are available in boxes of 25 with a long shelf life, ensuring all tests can be used before they expire for accurate testing results.

When can you use Hanna pre-dosed reagents?

Hanna reagents are compatible with our recommended instruments for COD testing, the Iris spectrophotometer. In addition, our 16mm reagent vials are in a compatible size for a wide range of meters available from other brands, including Hach, Lovibond and Palintest.

Make the switch to Hanna COD reagents today

If you are interested in bringing COD testing in-house or looking for a new reagent supplier for COD measurement, Hanna Instruments can help. Our specialists can advise on instrumentation and support you in transitioning to our highly accurate, UK-stocked reagents.

For advice and guidance on COD process and testing, get in contact with our experts directly on 01525 850 855 or via email.

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