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Proceedings of the International Conference on
Occupational & Environmental Exposures of Skin to Chemicals:
Science & Policy
Hilton Crystal City     September 8-11, 2002
 

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Workshop Discussion Paper (Version of 20 August 2002)

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Development of Colorimetric Indicators: A New Technique to Determine Glutaraldehyde and Alkaline Glutaraldehyde Contamination

Evanly Vo, National Personal Protective Technology Laboratory, National Institute for Occupational Safety and Health, Morgantown, WV, USA (Corresponding Author)

The aim of the study was to develop a new indicator sensor pad for detection of glutaraldehyde permeation of chemical protective gloves. The pad carries a reagent which responds to glutaraldehyde contaminant by producing a color change. Some commonly used glutaraldehyde and alkaline glutaraldehyde solutions, Metricide®, Cetylcide-G®, and 50% glutaraldehyde solution, were analyzed by solvent desorption and gas chromatography. All glutaraldehyde solutions exhibited >98% adsorption on the pads over the spiking range 0.05-5.0 µL. Recovery for each glutaraldehyde solution was calculated, ranging from 58-92% (RSD =4.0%) for all glutaraldehyde solutions. Breakthrough times for two protective glove materials (PVC and polymerized alkene) were determined using the Thermo-Hand Method, and found to range from 76 to 150 min for Metricide®, from 170 to 230 min for Cetylcide-G®, and from 232 to 300 min for 50% glutaraldehyde. The quantitative mass of the glutaraldehyde solutions on the pads at the time of breakthrough detection ranged from 35-37, 37-39, and 38-40 µg/cm² for Metricide®, Cetylcide-G®, and 50% glutaraldehyde, respectively. The new aldehyde indicator pad should find utility in detecting, collecting, and quantitative analyzing glutaraldehyde and alkaline glutaraldehyde permeation samples in the workplace.

 

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