Abstract
2,6-Di-tert-butyl-4-methylphenol (BHT) is an organic compound belonging to the phenol group and is an odorless, white or yellowish-white crystalline powder. BHT is an antioxidant used in the production of food, animal feed, animal and vegetable oils, paints, petroleum product soaps, synthetic rubbers and plastics, among others. Worker exposure to BHT can occur during the production, processing and use of the chemical. In 2021 the Group of Experts for Chemical Agents of the Interdepartmental Commission for MAC and MAI proposed MAC value of 10 mg/m3 for BHT. The aim of this study was to develop a method for determining BHT in workplace air for occupational exposure assessment within 1/10 ÷ 2 of the proposed MAC value. The method is based on retaining the BHT present in the air on a glass fiber filter and XAD-7 sorbent, leaching the retained substance with a solution of N,N-dimethylformamide in methanol and analyzing the solution by the use of gas chromatography with flame-ionization detection. The smallest concentration of BHT that can be determined under the conditions of air sampling and performing the determination is 0.96 mg/m3 (for an air sample of 60 liters). The method for the determination of BHT is presented in the form of an analytical procedure, which is included in the appendix. This article discusses the problems of occupational safety and health, which are covered by health sciences and environmental engineering.
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