Scott Berner wrote: > > On Wed, 2 Apr 1997, Philip wrote: > > > Greetings Scott, > > > > Thank you for the speedy reply. > > snip, snip - > > > > > > OK, so the word is 5ppm, several times a day. Correct? > > > > > This is my orientation, others on the list may see it otherwise. > > It is necessary to standardize a protocol, then duplicate the procedure > each time you make a production run. Take a representative sample and send > it off to a lab to be tested for ppm (and particle size if you really want > to get fancy). Then stick to the exact procedure in the future. It is > aproximate, but close enough I think, for personal use. > > > How does one filter them out? > > > > Lab supply houses have different types of filter paper. I use 25micron, > 5micron, and 1micron filters. About 6-10 cents a piece. > > VWR has a good selection you can get a catalog from them or order over the > phone 1-800-923-5000. > > I'll send you some materials via private e-mail, they are kind of bulky.
You've been most helpful, Scott, thanks very much. Also, I received the email materials. Good stuff. Philip
