[Histonet] Storage of 10M NaOH
peoshel <@t> wisc.edu
Mon Apr 12 10:02:41 CDT 2004
Glass -- silica -- is soluble in basic solutions. Not obviously, but
10M NaOH will attack the glass, and if ground-glass stoppers are
used, the NaOH will "weld" the stopper to the bottle.
As an interesting aside, seawater has a high enough pH, around 8,
that it will dissolve low levels of silica from glass bottles, enough
to interfer with studies of silica in seawater. Such as when [silica]
test formation of critters like diatoms and radiolarians is the
object of interest.
>Maybe not a strictly histochemistry question but maybe someone could
>provide me with an answer.
>I was just told that I shouldn't store the 10M NaOH that I use for
>adjusting the pH in a glass bottle. I was told that it needed to be
>made fresh and only kept in a plastic bottle. Why is this? How long
>can I keep a stock solution?
>If anyone has any ideas please let me know.
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