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J Occup Environ Hyg

Title:		Evaluation of a passive optical based end of service life indicator (ESLI) for organic vapor respirator cartridges
Author(s):		Checky M; Frankel K; Goddard D; Johnson E; Thomas JC; Zelinsky M; Javner C;
Address:		"a Personal Safety Division, 3M , St. Paul , Minnesota. b Shakopee High School (Teachers Working in Science and Technology at 3M) , Shakopee , Minnesota"
Journal Title:		J Occup Environ Hyg
Year:		2016
Volume:		13
Issue:		2
Page Number:		112 - 120
DOI:		10.1080/15459624.2015.1091956
ISSN/ISBN:		1545-9632 (Electronic) 1545-9624 (Print) 1545-9624 (Linking)
Abstract:		"A passive visual end of service life indicator (ESLI) for certain organic vapors has been attached to the inside wall of an organic vapor respirator cartridge. The opposite side of the ESLI touches activated carbon inside the cartridge. During use, organic vapors moving through the cartridge adsorb into both the carbon and the ESLI. The cartridge body is clear so that when vapor concentrations meet a certain threshold, the user may observe the progressive development of an indicator bar down the side of the ESLI. The cartridge is deemed ready to change when any part of the indicator bar touches a marked end line. The performance of the ESLI was observed when the cartridge was tested against a variety of organic vapors, exposure concentrations above the minimum indication level, humidities, temperatures, flow rates, and mixtures. In all cases, the ESLI indicated end of service life with more than 10% cartridge service life remaining (which is a NIOSH test criteria). The results were also compared to mathematical predictions of cartridge service life"
Keywords:		"Adsorption Air Pollutants, Occupational Charcoal *Gases Humidity Occupational Exposure *Respiratory Protective Devices *Volatile Organic Compounds Cartridge Esli indicator organic vapor respirator service life;"
Notes:		"MedlineChecky, Melissa Frankel, Kevin Goddard, Denise Johnson, Erik Thomas, J Christopher Zelinsky, Maria Javner, Cassidy eng England 2015/09/30 J Occup Environ Hyg. 2016; 13(2):112-20. doi: 10.1080/15459624.2015.1091956"