Determining Ozone in Solution ROBERT S. INGOLS, ROBERT H. FETNER, and WILLIAM H. EBERHARDT
Downloaded by CORNELL UNIV on June 1, 2012 | http://pubs.acs.org Publication Date: January 1, 1959 | doi: 10.1021/ba-1959-0021.ch014
Georgia
Institute of Technology, Atlanta,
Ga.
Stable ozone solutions have been a n a l y z e d by various techniques recommended in the literature, a n d results are compared a n d interpreted. Data are presented to correlate the quantity of the by-product oxygen from the ozone reaction with the apparent amount of original ozone.
T h e d e t e r m i n a t i o n of ozone i n w a t e r s o l u t i o n i s c o m p l i c a t e d b y t h e i n s t a b i l i t y of t h e ozone i n s o l u t i o n . A l d e r a n d H i l l (1) a n d S t u m m (12) s h o w e d t h a t ozone i n s o l u t i o n is m u c h m o r e s t a b l e a t l o w p H v a l u e s a n d a t t e m p e r a t u r e s n e a r t h e f r e e z i n g p o i n t of w a t e r , u s i n g t h e a b s o r b a n c e of a n ozone s o l u t i o n a t 2 5 8 t o 2 6 0 ταμ. T h e a u t h o r s r e p e a t e d t h e w o r k of A l d e r a n d H i l l (1) a n d K i l p a t r i c k , H e r r i c k , a n d K i l p a t r i c k (8) a t p H 2.0 a n d 1° C . a n d f o u n d t h e ozone s o l u t i o n c o m p l e t e l y s t a b l e , w i t h n o change i n a b s o r b a n c e a f t e r 8 h o u r s . U n d e r these c o n d i t i o n s , a n e x t i n c t i o n coefficient of 2600 w a s o b t a i n e d as c o m p a r e d w i t h 3000 (8) a n d 1000 (1). I n the classical equation, 0
3
+ 2 H + + 2 1 -
