Ocean chemicals

Chemcatcher

A passive sampling device for monitoring pollutants in the aquatic environment

Most environmental monitoring programmes involve the periodic collection of low-volume spot (bottle or grab) samples of water. This is challenging, particularly where concentrations fluctuate over time and where chemicals are only present at trace levels.


 


Chemcatcher

 

Chemcatcher® is a low-cost, passive sampling device, that can be used to solve this problem. It has been used by academic scientists, governmental and environmental agencies and the water industry throughout the world. It has been used alongside – and to replace – established water monitoring approaches that rely on infrequent spot or bottle sampling.

The original Chemcatcher® was developed by researchers at the University of Portsmouth, Portsmouth, UK and Chalmers University of Technology, Göteborg, Sweden.

What is Chemcatcher?®

Chemcatcher® comprises a robust, reusable, water-tight PTFE body. This is designed to accommodate different types of receiving-phase disks. The use of a bound receiving phase ensures that the active sampling area of the device remains constant during laboratory calibration uptake experiments and in field deployments. This increases reproducibility of the measurements.

The receiving phase disk is selected according to the class of compounds being measured (e.g., non-polar organic, polar organic, metals, radionuclides). In some applications, a thin diffusion-limiting membrane is placed over the receiving phase to restrict the rate of uptake of pollutants.

Different combinations of receiving-phase disks and overlaying diffusion-limiting membranes are used for monitoring the broad classes of pollutants found in the aquatic environment: 

  • Trace metals
  • Nutrients
  • Radionuclides
  • Organo-metallics (TBT)
  • Polar organics (including metaldehyde)
  • Non-polar organics

Where can I source Chemcatcher?®

Chemcatcher® is is a registered trademark in Great Britain and Northern Ireland. 

Today, the worldwide licence to manufacture and sell Chemcatcher® is held by T.E. Laboratories (TelLab) – an Irish company active in environmental analytic services and new product development.

To purchase Chemcatcher® systems, components and accessories, visit TelLab’s dedicated Chemcatcher® site at chemcatcher.com, call +353 59 9152881 or email sales@chemcatcher.ie.

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