On Monday, January 25, 1999 at 12:00:00 AM UTC-8, Dr. Norbert Reuter wrote:   
   > Dear Netters,   
   >    
   > I am looking for all information about the Brockmann Activity Scale,   
   > definitions or whatever.   
   >    
   > Everything is welcome. Please answer also via email (news feed is   
   > sometimes 3-4 days behind).   
   >    
   > Thnx   
   >    
   > Norbert   
   >    
      
      
   > nreuter@iname.com   
      
      
      
   Hello,   
      
   A common way to validate and compare silica gels with the same particle size   
   distribution is to perform a side-by-side chromatographic separation of a well   
   understood sample mixture. However, for users who do not have access to a   
   known and well    
   characterized sample mixture, the Brockmann and Schodder test can become   
   useful.   
      
   The test first described by Brockmann and Schodder showed that there is clear   
   relationship between sorbent water content and its retention characteristics.   
   One of the conclusions drawn at that time, which is still considered to be   
   important by process    
   engineers and chemists, is that reproducible and well controlled water content   
   is mandatory for the achievement of highly reproducible intra and inter-column   
   chromatographic separation   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)