In 1839, chemist Christian Friedrich Schönbein identified ozone through its distinctive odor during electrolysis experiments. By 1845, Schönbein developed an ozonometer utilizing paper impregnated with potassium iodide and starch, which turned blue upon oxidation by atmospheric ozone. Although this colorimetric method allowed for the first systematic monitoring of atmospheric oxidants across Europe, contemporary researchers encountered significant methodological obstacles. The iodometric test paper was highly sensitive not only to ozone but also to atmospheric humidity and sulfur dioxide, the latter of which acted as a reducing agent that bleached the blue starch-iodine complex. Consequently, readings taken near industrial centers routinely underestimated ozone concentrations, whereas measurements in coastal regions exhibited false elevations due to ambient moisture accelerating the chromogenic reaction. To offset these discrepancies, meteorologist Karl Jelinek introduced a standardized drying chamber in 1856 to desiccate ambient air prior to exposure, though this apparatus inadvertently removed a portion of gaseous ozone through wall-adsorption.
Based on the passage, which of the following statements regarding early atmospheric ozone testing methods are explicitly supported?
Select all that apply.
- The colorimetric test developed by Schönbein was susceptible to interference from atmospheric moisture.Cevap
- BSulfur dioxide in industrial areas reacted with Schönbein's test paper to produce falsely elevated ozone readings.
- Jelinek's drying apparatus resulted in the accidental loss of some ozone during the sampling process.Cevap