Biocide Surfactant


Surfactant chemistry is commonly found in biocide formulations, where the reactivity breaches bacterial cell walls. The presence of high concentrations of surfactant monomers in batch dosed biocide treatments means that the concentration within the waters is usually in excess of the Critical Micelle Concentration (CMC).

Anpera produces hardware and software capable of monitoring the presence of micelles, allowing the tracking of surfactant-based biocide slugs by geographic position and time.

By assessing the CMC of the formulation and understanding the functional 'kill dose' of the biocide, TraxBio™ can be used to determine the residence time of biocide treatments and determine if a sufficient concentration of active chemical is present to maximise biocidal efficacy.

How Does Biocide Mapping Work?

TraxBio™ - The Theory


High Surfactant Concentration

Close to the injection point, concentrations of components of the formulation are in high concentration with surfactants in levels above the CMC.

Samples provide a high micelle index value.

Medium Surfactant Concentration

As the slug moves further from the injection point, surfactant is consumed by anti-microbial action or losses to solids.

Samples provide a medium micelle index value when compared to upstream samples.

Low Surfactant Concentration

Further from injection, the biocidal surfactant is consumed until levels fall below the CMC of the chemical.

Samples will show a micelle index of zero. Spiking experiments allow an assessment of how far below the CMC the samples are.


Our Case Study section details an extensive test of biocide treated waters over a large production facility.

TraxBio™ Case Study
On-Site Water Monitoring

TraxBio™ can be deployed through modification of Comic™ technology.

Simple addition of biocide treated water to our dedicated reagent kits is followed by analysis on a supplied instrument. Automated analysis algorithms quickly process the measured data, providing a single Micelle Index value that is indicative of the surfactant population of the sample.

TraxBio™ allows quick assessment of the chemical residence at the sample point affording a new tool in monitoring biocidal treatment.

To find out more about developments in TraxBio™ or to deploy the technology, get in contact.

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