February 1, 2002
      
                  
        
  Author(s)
  Pamela M. Chu,   R D. Suenram,   Angela R.  Hight Walker,   R S. DaBell,   George C. Rhoderick,   Gerald T. Fraser
 
       
            
    
    
        There is strong interest by regulatory agencies and automobile manufacturers, motivated in large part by increasingly stringent emission standards, for measurement tools capable of quantifying various hydrocarbons, oxygenated hydrocarbons, etc., in