Experimental techniques discharge flow method

The experimental techniques used to study the kinetics of OH radical reactions can be separated Into two distinct methods, namely, absolute and relative rate techniques. The absolute methods have employed discharge flow, flash photolysis, modulation-phase shift, and pulsed radlolysls systems, while a variety of differing chemical systems have been used to determine relative rate data. These techniques are briefly discussed below. 

There have been two experimental determinations of the overall rate coefficient. Fehsenfeld [37] used a flowing afterglow technique at 300 K, obtaining an overall rate coefficient of (8 4) x 10 ° cm s . Milligan and McEwan [38] used a SIFT method to generate Hs and a microwave discharge to form 0( P). The experiments were conducted under conditions where [Hs ] [0( P)], so that... 

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