Interlaboratory study of benzene stability of tedlar bags. Final report
A study was initiated to determine the long-term stability of benzene vapors stored in Tedlar (polyvinyl fluoride) bags because the Air Resources Board and other air-monitoring agencies have adopted the technique of using these bags to collect samples. Many times, due to the analytical work load in the organic analysis laboratory, these samples may have to wait a number of days before their analysis can be performed. To validate the results, it was necessary to determine the stability of benzene in these bags. The Sampling Technique and Analysis Methods Subcommittee of the Toxic Air Monitoring Technical Advisory Committee (TAMTAC) proposed a study at concentrations of ambient and source levels (10-50 ppb and 5-20 ppm). The average concentration of the ambient range (10-50 ppb) of benzene vapor was 98.5% of the initial concentration after seventy-two hours of storage in the Tedlar bags and, after 150 hours, the average concentration was 92.3% of the initial value. The average concentration of the source level (5-20 ppm) average of the initial concentration was 96% after seventy-two hours and 92.5% after 150 hours.
- Research Organization:
- California State Air Resources Board, Sacramento (USA)
- OSTI ID:
- 7120720
- Report Number(s):
- PB-87-109591/XAB; ARB/HS-86/01
- Country of Publication:
- United States
- Language:
- English
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