Enviro Tech Validates ChemDAQ’s Peracetic Acid Vapor Sensor

Enviro Tech independently validates ChemDAQ’s PAA sensor technology used in Steri-Trac and SafeCide

Enviro Tech Chemical Services Inc., a major supplier of Peracetic acid (PAA), completed an independent validation study to test the accuracy and precision of ChemDAQ’s Peracetic acid vapor sensor that is used in both the portable (SafeCide) and fixed (Steri-Trac) monitoring systems. ChemDAQ’s PAA sensor utilizes patent pending filter technology to eliminate interference from Hydrogen peroxide and does not respond to Acetic acid (common interferents in PAA vapor detection). The study confirms the precision, accuracy, and specificity of the ChemDAQ PAA Sensor. The abstract for Enviro Tech’s study, entitled “Validation of a Real-Time Peracetic Acid Vapor Sensor,” is as follows:


Currently, ChemDAQ Inc. is the only company that has a commercially available real-time peracetic acid (PAA) vapor monitor. To date, there has been no publicly available paper that validates the accuracy or precision of their sensor. In order to determine the accuracy and precision of the ChemDAQ PAA vapor sensor, Enviro Tech Chemical Services, Inc. developed a novel absorption column system that captures and solubilizes vapor phase PAA that is then able to be quantified. PAA vapor was generated from two distinctly different PAA formulations at various concentrations and the ChemDAQ PAA sensor measurements were compared to that of the absorption column design. The results of the study determined that regardless of the PAA formulation, the PAA vapor produced was virtually identical at equivalent solution concentrations. ChemDAQ’s PAA vapor sensor proved to be a comparably accurate unit for measuring vapor phase PAA in real-time. The results from the PAA vapor sensor as well as the absorption column showed a strong linear correlation between PAA solution concentration and vapor production. ChemDAQ’s PAA sensor correlated well with the results of the absorption column yielding a difference of ≤10.0% between PAA solution concentrations of 25-100 ppm. There was no detectable interference from hydrogen peroxide or acetic acid. When the PAA solution concentration was increased to 250 ppm, there was a slight deviation (14.7% difference) between the absorption column method and the vapor sensor but this may be attributed to the PAA vapor phase concentration being near the upper end of the sensor’s detection limit.


The full validation study can be found here.

PAA has become widely used across many industries due to its efficacy, organic approval status, and safe disinfection byproducts, but the vapors can pose a risk to workers if not controlled. To control PAA vapor, you need to accurately measure it.

Breathing PAA can irritate the lungs causing coughing and/or shortness of breath. Higher exposures can cause a build-up of fluid in the lungs (pulmonary edema), a medical emergency, with severe shortness of breath. High or repeated exposure can also damage the liver and kidneys.

Changes or failures can occur at any time, making monitoring an essential safety measure.

The regulatory environment concerning Peracetic acid is changing due to increasing concerns of employee safety. In 2014, the American Conference of Governmental Industrial Hygienists (ACGIH) released a Short-Term Exposure Limit (STEL) for Peracetic acid of 0.4 ppm. Recently, NIOSH has proposed an Immediately Dangerous to Life and Health (IDLH) level of 0.55 ppm, which is currently under review.

There previously was no commercially available technology to measure real-time PAA vapors in the air, so ChemDAQ developed their portable and fixed gas detection solutions to help address increasing industry concerns. With these tools, PAA vapor can be measured over time or on the spot, giving you the ability to control your environment and prevent or address concerns in real-time.


Fixed: Steri-Trac Continuous Peracetic Acid Vapor Monitor

Steri-Trac Continuous Peracetic Acid vapor monitor


Portable: SafeCide Portable Peracetic Acid Vapor Monitor


There is now a fast, easy, and reliable way to give employees peace of mind they are safe, while minimizing disruption to your operations. Join countless others, and start monitoring today.


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