Evaluation of a passive optical based end of service life indicator (ESLI) for organic vapor respirator cartridges
| Autor: | Maria L. Zelinsky, J. Christopher Thomas, Denise L Goddard, Cassidy Javner, Erik Johnson, Checky Melissa A, Frankel Kevin A |
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| Rok vydání: | 2016 |
| Předmět: |
business.product_category
ESLI Nanotechnology Air Pollutants Occupational 02 engineering and technology Article 03 medical and health sciences Cartridge 0302 clinical medicine Occupational Exposure Respiratory Protective Devices Respirator service life Volatile Organic Compounds Waste management Chemistry indicator Public Health Environmental and Occupational Health Humidity respirator Original Articles 021001 nanoscience & nanotechnology 030210 environmental & occupational health Organic vapor Charcoal Service life Adsorption Gases 0210 nano-technology business organic vapor |
| Zdroj: | Journal of Occupational and Environmental Hygiene |
| ISSN: | 1545-9632 1545-9624 |
| DOI: | 10.1080/15459624.2015.1091956 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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