We've been struggling to find a lab to do testing for bucket samples in the greater New Orleans area. Does keeping a sample refrigerated extend the time frame we have to get to a lab for testing? I know the bucket samples generally need to get to a lab within 24hours.
A researcher at the EPA reported a study back in 2007, testing how samples of certain volatile organic compounds (VOCs) in Tedlar bags are affected by time and temperature. Their presentation is here: https://iavi.rti.org/assets/docs/WorkshopsAndConferences/09-Paul_AEHSTedlar2007.pdf
The general issue seems to be that VOC concentrations in the sample could decrease over time if the gases leak or react with the Tedlar bag material; but concentrations could also increase over time if chemicals from the bag itself leached into the sample. It depends on what particular compounds are in the sample and what material the sampling container is made of.
The report linked above shows some of the VOCs they tested...
It'd be difficult to apply these results broadly to air samples, though, because it does depend on what's in the sample.
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