Each sampling bag (1L) was filled with nitrogen and put in an oven at 60 °C. 1 hour later, the each gas in the bags is withdrawn into a gas tight micro syringe and injected directly to a GC/MS. Both bags were not flushed/cleaned with nitrogen.
Smart Bag PA
Time (min.)
Tedlar Bag
After being filled with nitrogen, both bags were closed and put in an oven at 60 °C. 1 hour later, each 1L gas in the bags was vacuumed with a pump through a DNPH cartridge and eluted sample was analyzed by HPLC. The both bags were not flushed/cleaned before the test.
The same volume with the same constitution of vaporized standards were introduced to each bag. Then nitrogen was added to each bag and were measured by a GC/FID.
Standard Compound List: Acetone, Methylethylketone, Methyl isobutyl ketone, Isopropyl alcohol, Isobutyl alcohol, 1-Butanol, Ethylbenzene, Cyclohexane, n-Hexane,o-Xylene, m-Xylene Toluene, Dichloromethane, Methyl acetate, Ethyl acetate, Isobutyl acetate, n-Butyl acetate (50 ng/mL each)
After preparation of each malodorous sample as described below, 5L Smart Bag PA and 5 L Tedlar Bag were filled with the sample together with nitrogen gas. Concentration changes over time were calculated with a detecting tube at certain times.
Permeation rates of O 2 , N 2 , CH 4 and CO 2 were measured using a permeation rate measurement system on each sampling bag.
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Smart Bag PA