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Detecting methanol in hand sanitizers.

Andreas T Güntner1, Leandro Magro1, Jan van den Broek1

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A new handheld device quickly detects toxic methanol in hand sanitizers. This low-cost, smartphone-assisted tool ensures sanitizer safety for consumers and health professionals.

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Area of Science:

  • Analytical Chemistry
  • Sensor Technology
  • Public Health

Background:

  • The COVID-19 pandemic led to a surge in hand sanitizer demand.
  • Methanol adulteration in sanitizers has caused numerous fatalities globally.
  • Regulatory bodies have set strict limits on methanol content in sanitizers.

Purpose of the Study:

  • To develop a rapid, low-cost, handheld device for selective methanol detection in hand sanitizers.
  • To provide an accessible screening tool for authorities, health professionals, and the public.

Main Methods:

  • Utilized a nanoporous polymer column for selective methanol adsorption and separation.
  • Employed a chemoresistive gas sensor for methanol detection.
  • Integrated the sensor with a smartphone for data analysis and assisted operation.

Main Results:

  • The device accurately quantifies methanol in sanitizers within two minutes (0.01–100 vol%).
  • Achieved excellent agreement (R² = 0.99) with gas chromatography for methanol quantification.
  • Demonstrated minimal interference from sanitizer composition and viscosity during testing on 76 commercial samples.

Conclusions:

  • The developed device offers a reliable and efficient solution for on-site methanol screening in hand sanitizers.
  • It addresses the urgent need for accessible technology to prevent methanol poisoning incidents.
  • The device empowers various users to ensure the safety of hand sanitizer products.