[Nhcoll-l] Phenolic lids in alcohol

[Steve Halford]

When phenolic capped vials are stored as you describe the caps can expand
over time and eventually fall off, potentially leading to lots becoming
mixed in the bottom of the holding vessel.  It's better to discard the cap
and replace it with a loose plug of cotton.  Face the  neck of the vial up
so no air bubbles become trapped.

Steve.

Steve Halford (halford at sfu.ca)
Museum Technician (Retired)
Department of Biological Sciences
Simon Fraser University



On Fri, Jun 13, 2014 at 10:28 AM, Callomon,Paul <prc44 at drexel.edu> wrote:

>  Folks,
>
>
>
> We have noticed that in cases where a phenolic resin cap is immersed in
> alcohol (70-80% ethanol) for long periods (such as when a vial with a
> sample is included in a larger alcohol-preserved lot) the alcohol becomes
> discolored. I presume the resin is leaching something. Does anyone know of
> any published work on this?
>
>
>
> *Paul Callomon*
> *Collection Manager, Malacology, Invertebrate Paleontology and General
> Invertebrates*
>  ------------------------------
>
> *Academy of Natural Sciences of Drexel University, Philadelphia*
>
> 1900 Benjamin Franklin Parkway, Philadelphia PA 19103-1195, USA
> *callomon at ansp.org <callomon at ansp.org> Tel 215-405-5096 <215-405-5096> -
> Fax 215-299-1170 <215-299-1170>*
>
>
>
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