Breath sampling Tedlar bags

Beauchamp et al. also investigated the use of Tedlar bags for breath sample collection, whereby a sample bag was filled with a mixture of VOCs (containing alcohol, nitrile, aldehyde, ketone, terpene and aromatic compounds) in known concentrations and air was then sampled regularly from that bag over a 70-hour period [62]. As expected, the concentrations of these compounds declined over time owing to the various loss processes mentioned above. The researchers concluded that accurate results can only be obtained providing measurements are made within 10 hours of sample collection. The same contaminant ions at m z 88 and 95 seen in the work by Harren and co-workers [65] were also observed by Beauchamp et al. 

Steeghs, M. M. L., Cristescu, S. M., Harren, F. J. M. (2007) The suitability of Tedlar bags for breath sampling in medical diagnostic research. Physiol. Meas. 28,73. 

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