Chemcatcher® for non-polar organic compounds
A popular application is the non-polar Chemcatcher. Recent applications include the measurement PAHs, PCBs, and specific pesticides. Performance reference compounds (PRCs) can be used to correct for any variations in environmental conditions (e.g. changes in water temperature and turbulence) during a field deployment. Such variations are then taken into account when estimating the TWA concentration during the exposure period.
Chemcatcher® for polar organic compounds
There has been recent interest in monitoring polar chemicals in water. This class includes polar pesticides (e.g. acid herbicides) and emerging pollutants such as pharmaceutical residues and personal care products. Two designs of Chemcatcher® are available to sequester these types of chemicals. Normally a diffusion-limiting membrane is employed also. Performance reference compounds (PRCs) cannot be used effectively with this version of Chemcatcher®.
Chemcatcher® for metaldehyde
Metaldehyde is a potent molluscicide and is the active ingredient in most formulated slug pellets. Large quantities of pellets are used in some agricultural areas at specific times in the year to control infestations in crops. As a consequence, often high concentrations of metaldehyde can found in surface waters after significant rainfall events. Chemcatcher® can be used to measure metaldehyde in water.
Chemcatcher® for metals
The Water Framework Directive (WFD) was introduced to achieve protection and sustainable development of water resources in the European Union (EU) countries through established Environmental Quality Standards (EQS). The directive sets annual averages and maximum allowable concentrations for inland and other surface waters for the dissolved fraction of some trace metals including nickel (Ni), cadmium (Cd), lead (Pb), zinc (Zn) and mercury (Hg) which are potentially quite toxic to aquatic life.
Applications include the measurement cadmium, copper, lead, mercury, nickel and zinc.
Chemcatcher® for organometallic compounds
This passive sampler device can be used to measure organotin compounds including: monobutyltin, dibutyltin, tributyltin (TBT) and triphenyltin.
Chemcatcher® for radionuclides
The Fukushima nuclear reactor incident in 2011 led to the release of large quantities of radioactive isotopes into the environment. Of particular concern was the impact of radio-caesium in different environmental compartments. Chemcatcher® has been shown to be effective in monitoring radio-caesium in contaminated water bodies. This work was undertaken by the Chiba Institute of Technology (Tokyo, Japan). Information obtained from using the device has helped to inform the environmental fate of radio-caesium and to assess the effectiveness of different remediation measures.