Stirring bar NOT made of PTFE

[Per Thoren]

Has anyone come across stirring bars that are NOT made of PTFE, but of e.g. glass or PS? I would like to graft PEG to the surface and that seems impossible with the PTFE coating that is standard.

Per Thorén
Dept. of Physical Chemistry
Göteborg
Sweden

[Michael R. Thompson]

I used to make my own micro-stir bars when I needed one: take some soft
(i.e. non-pyrex) glass tubing, score and break to the length needed, insert
an appropriate length of iron wire (e.g. a piece of straightened paper-clip)
then fuse the ends of the glass tube in a bunsen. These are non-magnetic
themselves but work fine on a standard stir plate with magnetic impeller.

Per Thoren wrote in message <7jj4ti$7...@net.bio.net>...

>Has anyone come across stirring bars that are NOT made of PTFE, but of e.g.
glass or PS? I would like to graft PEG to the surface and that seems
impossible with the PTFE coating that is standard.
>

>Per Thorin
>Dept. of Physical Chemistry
>Gvteborg
>Sweden
>
>