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[Resorcinol - determination method in the workplace air].

Anna Jeżewska1, Dorota Kondej1

  • 1Centralny Instytut Ochrony Pracy - Państwowy Instytut Badawczy / Central Institute for Labour Protection - National Research Institute, Warsaw, Poland (Zakład Zagrożeń Chemicznych, Pyłowych i Biologicznych / Department of Chemical, Aerosol and Biological Hazards).

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Summary

A new method accurately measures resorcinol in workplace air, crucial for assessing worker exposure to this harmful chemical. This validated technique ensures reliable occupational hygiene monitoring.

Keywords:
determination methodenvironmental engineeringhealth sciencesresorcineresorcinolworkplace air

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Area of Science:

  • Occupational Health and Safety
  • Analytical Chemistry
  • Environmental Science

Background:

  • Resorcinol (1,3-dihydroxybenzene) is an industrial chemical with significant health risks, including irritation, methemoglobinemia, hemolysis, and potential kidney and liver damage.
  • Exposure to resorcinol in the workplace necessitates reliable methods for monitoring its concentration to ensure worker safety.
  • The maximum allowable concentration (MAC) for resorcinol requires sensitive analytical techniques for effective risk assessment.

Purpose of the Study:

  • To develop and validate a method for determining resorcinol concentrations in workplace air.
  • To establish a method capable of measuring resorcinol within a range relevant to occupational exposure limits (0.1-2 times the MAC value).
  • To provide a reliable tool for occupational hygiene laboratories to assess worker exposure to resorcinol.

Main Methods:

  • Air samples containing resorcinol were collected using cellulose filters.
  • Resorcinol was extracted from the filters using an aqueous methanol solution.
  • High-performance liquid chromatography (HPLC) with a diode array detector (DAD) was employed for quantitative analysis, using an Allure Basix column.

Main Results:

  • The developed method accurately quantifies resorcinol in workplace air within the concentration range of 4.5-90 mg/m³.
  • The method exhibits a limit of detection of 0.087 μg/ml, a precision of 5.16%, and a relative expanded uncertainty of 22.6%.
  • The method demonstrates selectivity, enabling the accurate determination of resorcinol even in the presence of related compounds like dihydroxybenzene isomers, benzene, and phenol.

Conclusions:

  • The validated method offers good precision and accuracy for resorcinol determination in workplace air.
  • The method complies with the stringent requirements of the European Standard PN-EN 482.
  • This analytical technique is suitable for use by occupational hygiene laboratories to monitor and control worker exposure to resorcinol.