From: poutnik4nntp@gmail.com   
      
   Dne 26/08/2015 v 20:08 c2o.pro.br@gmail.com napsal(a):   
      
   What about to produce standard solutions   
   by controlled dilution of Natrium hypochlorite - bleaching agent ?   
      
   Than doing some simple comparative colorimetry   
   by dropping agents into tested water, min and max standard solution ?   
      
   --   
   Poutnik ( the Czech word for a wanderer )   
      
   Knowledge makes great men humble, but small men arrogant.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)