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Long Term Storage of Air Samples - A Study of Two Bag Materials
Technical Paper
2000-01-2502
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Concentrations of six organic gases/vapors were monitored over a period of 90 days in two popular styles of polymer sample bags. The test species were selected to cover many different chemical properties and included aromatic, aliphatic, chlorinated aliphatic, alcohol, non-chlorine refrigerant and ketone structures. The two bag styles were (1) single layer Tedlar, and (2) Multilayer (polyethylene on the inner (sample side) surface and an intermediate layer of aluminum). The two bags exhibited different storage properties. The Tedlar bags showed only gradual losses with little initial adsorption on the bag surface. The Multilayer bags exhibited virtually no diffusive loss, but in some cases significant loses due to adsorption. For short term storage of up to several days, the Tedlar bag is preferred. For long term storage of several weeks to months, the Multilayer bag is necessary, but will not provide true values of the initial concentrations. The possible implications of this study to the myriad of industrial needs for gas sampling and sample preservation are obvious.
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Authors
Citation
McCarrick, A., "Long Term Storage of Air Samples - A Study of Two Bag Materials," SAE Technical Paper 2000-01-2502, 2000, https://doi.org/10.4271/2000-01-2502.Also In
References
- Technical Manual for Nuclear Powered Submarine Atmosphere Control Manual S9510-AB-ATM-010 30 July 1992
- Wyatt, J. Wright, K. Daley, T. ‘The Impact of CFC Conversion on Nuclear Powered Submarines’ SAE Technical Paper 972395 , 27 th International Conference on Environmental Systems (ICES) July 14-17 1997