Permeation testing using a newly developed data acquisition system.
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas. Fairfax, VA: American Industrial Hygiene Association, 2003 May; :66
A new data acquisition system, referred to as the Permeation and Penetration Data Acquisition System (PPDAS), was developed in our laboratory for accurate permeation testing for chemical protective clothing and gloves. The system allows users to define, set up, and run chemical permeation/penetration experiments under controlled laboratory test conditions. The system takes readings from a gas analyzer at prescribed data acquisition intervals. Readings in voltage are automatically converted to concentrations based on a precalibration. PPDAS allows users to determine both breakthrough time and steady state permeation rate much more accurately when compared to a chart recorder which is widely used for such tasks. In addition, the numerical outputs of the permeation testing can be incorporated into a spreadsheet for further data analysis. This system has been used to investigate extended permeation behaviors. For instance, when using the PPDAS coupled with a MIRAN infrared analyzer to determine the permeation rate of a nitrile/acetone combination, we found that the steady state was not fully developed yet even when the output had reached the whole scale of the analyzer recorder. The average permeation rate was calculated to be only 93.9% of that after the steady state was really established (n=6).
Data-processing; Laboratory-equipment; Protective-clothing; Protective-equipment; Protective-materials; Laboratory-testing
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas