Hi Lindsey,

we usually store our precombusted fiberfilters (glas or quarzfiber/diameter
25 or 28 mm) for isotopic analysis in packages of 10 filters wraped in
precombusted pieces of aluminum foil. To prevent contamination we do this
packing immediately after the combustion under a cleanbench and fold the
edges of the aluminum foil tightly several times on each side of the
package using gloves and forceps for all handling of the filters.
This type of packages we could use for a long period of time without any
contamination problems.

best regards
Klaus-Uwe Richter

Alfred-Wegener-Institute for polar and marine research
Am Handelshafen 12, 27570 Bremerhaven, Germany