Identification of Ozone in Los Angeles Atmosphere

Iodometric Microdetermination of Organic Oxidants and Ozone. Resolution of Mixtures by Kinetic Colorimetry

“…excess of nitric oxide gave better than 95% conversion in the 4-eecond flow-time allowed for the following very rapid reaction: stoichiometry close to O3 = Iz• For this reagent, we may write the following over-all empirical reaction: 0. + 2H+ + 2I--2-20 +02 (10) To attain this relationship, 45 minutes should be allowed after sampling for maximum color development.…”

Reactivity of Oxidizing Agents with Potassium Iodide Reagent

“…Reaction rate curves were obtained for most of the reactions studied. The presence of oxidizing materials in the atmosphere has been detected in many localities by the use of iodide solutions (4, [10][11][12][13]15). The iodide ion in solution is readily oxidized by many oxidizing agents; consequently, the term "oxidant" is used to represent the net result of atmospheric reactivity with iodide.…”

“…The iodide ion in solution is readily oxidized by many oxidizing agents; consequently, the term "oxidant" is used to represent the net result of atmospheric reactivity with iodide. In the Los Angeles area, the major part of the oxidant usually is ozone, but the nature of the remaining oxidizing material is not definitely known (7,11,12). Although some work has been done on the reactivity of several organic peroxides in the microgram range with iodide ion (3), it was felt that it would be useful to investigate the reaction of 6 X 10-2 (1% by weight) iodide ion with ozone, hydrogen peroxide, peracetic acid, succinic acid peroxide, cumene hydroperoxide, di-ferf-butyl peroxide, nitrite ion, and ferf-butyl nitrite in the 10~4 to 10~5M range under varying conditions of pH.…”

Responses of Cucumber, Onion and Potato Cultivars to Ozone

“…Ozone is estimated to be responsible for 85 to 90% of the total oxidizing potential of the polluted atmosphere of the Los Angeles and san Francisco Biy ut"as (Littman and Marynouski, 1956;Taylor, 1968), and has been identified as i causal factor in th_e foliar injury and yield depressions of several crop plants, particularly tobacco (Macdowall et al, 1964) and white beans (weav"t uoo Jackson, 196gi.…”