A recent independent study from the Journal of Environmental Quality has concluded that our exclusive PTFE Sampling Bag is superior to any other sample bag including Tedlar bags. “[Scentroid’s] PTFE bags were found superior for storing the considered odorants from pig production, especially for 4‐methylphenol, which was almost completely lost on introduction to Nalophan and Tedlar bags.”

https://acsess.onlinelibrary.wiley.com/doi/full/10.2134/jeq2017.07.0289

The study was conducted by Pernille Lund Kasper, Arne Oxbøl, Michael Jørgen Hansen, and Anders Feilberg funded by Green Growth and Development Denmark, Ministry of Food, Agriculture and Fisheries Denmark, and The Danish AgriFish Agency. It consisted of purchasing varying sample bag types, including our very own PTFE bag (found here: https://scentroid.com/products/sampling-bags/ptfe-bags/) Loss mechanisms of livestock odorants in sampling bags were also investigated. This was done with the understanding that loss rates in sampling bags are strongly influenced by compound volatility.

It is generally understood that the authenticity of an air sample could in fact be compromised through several factors. These include absorption from the sample bag itself or the tubes and fittings it is attached to. Sample loss can even be triggered by chemical interactions causing loss of the sample. Thus, the study evolved to deduce the optimal storage strategy for air samples containing livestock emissions.

Analysis of sample humidity, partitioning, and thermal desorption suggest one major point. The improved storage ability of PTFE bags was mainly caused by improved retention of the compounds. This was due to decreased diffusion compared with the other materials. Additionally, PTFE was found to maintain the original sample humidity for significantly longer periods. Our PTFE sampling bag is superior!

Should you have any additional questions regarding our PTFE technology, please don’t hesitate to contact us.