- Volume 18 Issue 4
DOI QR Code
Refined Exposure Assessment for Three Active Ingredients of Humidifier Disinfectants
Lee, Jong-Hyeon;Kang, Hyun-Joong;Seol, Hwi-Soo;Kim, Chan-Kook;Yoon, Seung-Ki;Gwack, Jin;Kim, Yong-Hwa;Kwon, Jung-Hwan
- Received : 2013.02.15
- Accepted : 2013.09.02
- Published : 2013.12.30
Exposure assessment for three major active ingredients used for humidifier disinfectants, polyhexamethylene guanidine (PHMG), oligo(2-(2-ethoxy)ethoxyethyl guanidinium chloride (PGH), and 5-chloro-2-methylisothiazol-3(2H)-one/2-methylisothiazol-3(2H)-one (CMIT/MIT) mixture, was conducted in a bedroom using an air sampler for a refined risk assessment. The experimental site was selected to reflect consumer exposure conditions. Aerosols formed by a humidifier were sampled during 8 hr at 7.5 L/min. Absorbed PHMG and PGH by the sampler were quantified using a spectrophotometric method, and high performance liquid chromatography-ultraviolet detection was used for CMIT/MIT. Three exposure scenarios were assumed for adding humidifier disinfectants to the humidifier water at 1, 2, and 10 times the volume recommended by the product suppliers, and the humidifier was on at its maximum rate of producing aerosols in order to consider reasonable worst-cases. The sampled mass of PHMG and PGH ranged 200 to
Air sampler;chloromethyl/methyl isothiazolinone (CMIT/MIT);Indoor air;polyhexmethylene biguanidine (PHMG);Risk assessment
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