Peracetic acid. Determination in workplace air
Journal Title: Podstawy i Metody Oceny Środowiska Pracy - Year 2015, Vol 31, Issue 3
Abstract
Peracetic acid (PAA) is a colorless liquid. It occurs in a form of a mixture in which it remains in a state of chemical equilibrium with hydrogen peroxide and acetic acid. PAA is frequently used as a bleach, disinfectant and oxidizing agent.The aim of this study was to develop and validate a sensitive method for determining PAA concentrations in workplace air in the range from 1/10 to 2 MAC values, in accordance with the requirements of standard PN-EN 482.The method is based on passing the air with PAA through impinger filled with water. PAA was determined indirectly by determining the product of its reaction with methyl-p-tolyl sulfide (MTS). Studies were performed using high-performance liquid chromatography (HPLC). An Agilent Technologies (Germany) chromatograph, series 1200, with a diode-array detector (DAD) was used in the experiment. An Ultra C18 column (250 x 4.6 mm, dp = 5 μm) with a precolumn (10 x 4.0 mm; Restek, USA) was applied.PAA could be determined in workplace air at the concentration range from 0.08 to 1.6 mg/m3. The use of ultra C18 column makes it possible to determine PAA.PAA absorbed in water with methyl-p-tolyl sulphide (MTS) and corresponding sulphoxide ensure the stability of a samplee. The method is precise, accurate and it meets the criteria for procedures for measuring chemical agents listed in EN 482:2006. This method can be used for assessing occupational exposure to PAA and associated risk to workers’ health. The developed method of determining PAA has been recorded as an analytical procedure (see Appendix).
Authors and Affiliations
Joanna Kowalska, Agnieszka Woźnica
Keywords
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