Marshall;

The TEM's that Stephen Quinto has on his web site for his product appears to be 
the
next best thing to you requested standard.

Buy it and try it.

"Ole Bob"


>
> Yes, I have used this myself.  Using the Hack scanning spectrophotometer, I 
> scan
> a specimen and can get a crude idea of the particle size distribution from the
> absorption spectrum from infrared to uv.  If I could obtain some samples with
> defined and narrow particle size ranges to calibrate from, I  think I could 
> do a
> very good job of using this technique to profile particle size of CS samples,
> but have not been able to source any such standards.
>
> Marshall
>