Chemical protective clothing: a comparison of chemical permeation test cells and direct-reading instruments.
Berardinelli SP; Mickelsen RL; Roder MM
Am Ind Hyg Assoc J 1983 Dec; 44(12):886-889
A procedure to determine break through times and steady state permeation rates for chemical protective clothing was evaluated. A standard chemical permeation test adopted by the American Society for Testing and Materials (ASTM) was used. The method used a commercially available test cell with acetone (67641) as the permeant against unsupported neoprene (69028371). The study also compared the AMK cell, a chemical permeation test cell, to the ASTM cell. Aqueous collection medium for the ASTM cell was deionized distilled water. Analysis was performed by gas chromatography. Fabric sample sizes required for the ASTM cell were approximately 7.8 centimeters (cm) in diameter; about 45 milliliters (ml) of permeant were required to fill the permeant side of the cell. For the AMK cell, fabric samples were about 2.5cm in diameter; about 10ml of liquid permeant was required to fill the permeant side of the cell. Test specimens were mounted in the cell, then gas or water was initiated into the collection side of the cell. Liquid permeant was added and breakthrough times were recorded. Testing continued until steady state was reached. Variation of breakthrough times between the two cells was insignificant. Steady state permeation rate differences in the two cells were significant. The authors conclude that the AMK cell can be used as a field technique in conjunction with a reliable, direct reading instrument, but it is limited due to the need for clean compressed air, flow controllers, and a vapor pressure saturator technique for calibration. The AMK cell compares favorably to the ASTM cell for determining breakthrough time and comparable steady state permeation rates with a photo ionization detector.
NIOSH-Author; Laboratory-testing; Equipment-design; Analytical-instruments; Personal-protection; Polymers; Chemical-manufacturing-industry; Industrial-safety; Safety-research; Physical-properties; Gloves; Protective-clothing
American Industrial Hygiene Association Journal