Analytical Methods for the Mixture of Didecyldimethyl Ammonium Chloride and Ethylene Glycol in Inhalation Chambers

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Research article

Journal of the Korean Society for Environmental Analysis 2015;18(2):85-92.

흡입챔버 내 Didecyldimethyl Ammonium Chloride 및 Ethylene Glycol 혼합물질 분석법 연구

이두희, 이원석, 이진선, 권정택, 권도영, 김은지, 박상아, 이혜리, 김현미

국립환경과학원

Abstract

This study evaluated analytical methods for the mixture of ethylene glycol (EG) and didecyldimethyl ammonium chloride (DDAC), which are used as the main components of deodorants and biocides. EG and DDAC were nebulized in aerosol into inhalation chambers. For absorbents of EG and DDAC, XAD-7 OVS resin and glass fiber (GF) filters were used, respectively. Instrumental analysis was conducted with gas chromatography/ flame ionization detector (GC/FID) for EG and high performance liquid chromatography with triple-quadrupole mass spectrometer (LC/MS/MS) for DDAC. The method detection limit (MDL) and the limit of quantitation (LOQ) were 24 μg/m3 and 77 μg/m3 for EG, and 13 ng/m3 and 41 ng/m3 for DDAC. The recovery rates ranged from 100.7% to 105.5% for EG, and 97.4% to 98.9% for DDAC. The relative standard deviation (RSD) of EG and DDAC ranged less than 5.72%. Daily monitoring was also conducted at the concentration of 0.2% for 7 days. The results showed that the mean values ranged from 0.728 mg/m3 to 0.739 mg/m3 and the overall accuracy was 11.9% to 16.2%.

Key Words: EG, DDAC, GC/FID, LC/MS/MS, Inhalation chamber