Laboratory grade results in a field instrument

Palintest paired up with CEBAS CSIC in Spain, Campden BRI in the UK, and SGS in China to get external validation of the sensor products against laboratory methods such as titration and HPLC.

Why are accurate measurements important?

In the fresh produce washing industry, the best way to ensure that the produce is free of pathogens is to monitor the disinfectant level of the water. Accuracy describes how close to the true value your measurement method result is. An inaccurate measurement result will give you a false view of the disinfectant level in the wash water. Take a look at our short support document which explains the difference between accuracy and precision.

If the disinfectant level is not accurately measured, then you run the risk of underdosing the disinfectant and causing harm to your customers by not removing harmful bacteria. Alternatively, you could be over-dosing your disinfectant which is a needless expense with potential taste implications. Take a look at our article Why It Is Important To Get Fresh Produce Washing Right for more information on why it is important to accurately monitor disinfectant levels. Palintest’s sensor technology has been proven in fresh produce washing applications to be more accurate than the traditional drop count kit, and also comparable in terms of accuracy to the laboratory methods.
Manually inserting a sensor into the Kemio disinfection product


With each partner, Palintest’s sensor technology was tested at the same time as the traditional industry method of drop count kits, and either the standard laboratory titration or the laboratory high-performance liquid chromatography (HPLC) method.

Each method was used to measure produce wash water with differing disinfectant levels, and the average results for each method compared to ensure that the sensor methodology was comparable to the lab methods, and had improved accuracy and precision compared to the drop count method.

Data Summary

Across all concentrations of disinfectants, Palintest’s sensor technology produces measurements with a similar degree of accuracy and precision to the laboratory methods.

Accuracy in disinfectant measurement is key to keeping customers safe and managing cost efficiencies


  1. PAA sensors gave similar results to laboratory HPLC standard method
  2. Chlorine and PAA sensors give similar accuracy to laboratory titration
  3. Significant improvement in accuracy for sensors, compared with traditionally used drop count kits

For further information on the experiment or to discuss how our technology can help support you, contact our team.

For more information about our research partners, please visit:

Campden BRI –

A graph to compare similar results between the PAA sensor method and the laboratory HPLC method

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