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Question:Can we add a 2um filter to the bucket monitor to capture particulates?

kgradow1 is asking a question about air-quality: Follow this topic

by kgradow1 | May 20, 2020 13:37 | #23673

This question was asked by @mimiss during this week's Open Hour.

The bucket monitor is used to sample chemicals in the air including VOCs (volatile organic compounds) and sulfur compounds. Buckets are similar to Summa canisters, which capture 30-hour samples in a polished container. Summa canisters come with a 2um filter that is built into the flow controller to prevent contamination of the intake valve. This is a two-part question:

  • Can this be added to the bucket valve?
  • Can the filter be analyzed independently to get a snapshot of particulate matter?


@mimiss: I think the answer to the first question is probably yes! The bucket uses a Swagelok adapter, similar to the Summa canisters, and it looks like the filter just fits into that adapter. If these are standard filters, we can order them and try it out later this month.

I wonder how easy the filters are to remove from the adapters after filling the bags? If we can see it on a microscope, those filters tend to look like very small grids, it might be possible to count a piece of this grid and approximate # of particles or if there would be so many it's not possible.

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