From: Poutnik4NNTP@gmail.com   
      
   On 08/25/2015 04:13 PM, c2o.pro.br@gmail.com wrote:   
   > Hi,   
   >   
   > I need to prepare standard solution of chlorine for ORP electrode   
   calibration, but don't want to use conventional methods, for example iodometry.   
   >   
   > I'm thinking to to prepare a solution of chlorine with known concentration   
   using coulometry of HCl solution.   
      
   What anode would you use ?   
   There is danger of secondary electrode reactions.   
   E.g. HCl with chlorine in statu nascendi   
   dissolves gold and probably platinum as well.   
      
   >   
   > Could someone give any hints how to do this easily?   
   >   
   > Any other suggestions?   
   >   
   > Thanks,   
   > Markos   
   >   
   I would avoid standard methods   
   only if I know exactly what and why I am doing.   
      
   If I had to ask, I would do probably better   
   to stick with standard methods,   
   to avoid a priori not obvious traps.   
      
   As some ideas may sound great,   
   but there may be reasons why nobody use them,   
   if I am not the first person with such an idea.   
      
   At least, I would to use both standard and new methods in parallel,   
   and thoroughly compare the results for random and systematic errors.   
      
   --   
   Poutnik ( the Czech word for a wanderer )   
      
   Knowledge makes a great man humble, but a small man arrogant.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)