AtmosphericSamplingforAldehydesandEye Irritationin Los Angeles Smog—1960

Spectrophotometric AnalysisofAldehydesin the Los Angeles Atmosphere

“…7 For the same hours during September, October, and November 1961, the average formaldehyde concentration was 0.045 ppm. About six percent of the 1960 values were in the 0.10 to 0.15 ppm range and four percent of the 1961 values were in the same range; thus, over-all agreement for the two years was very good.…”

“…1 In previous work the samples were collected in aqueous bisulfite solution with subsequent addition of the CA reagent. 7 The present procedure increases the sensitivity appreciably. The 4-hexylresorcinol (4-AR) method for acrolein originally developed in our laboratories 5 was used in a previous study in Los Angeles.…”

“…The 4-hexylresorcinol (4-AR) method for acrolein originally developed in our laboratories 5 was used in a previous study in Los Angeles. 7 In that investigation the acrolein was collected into alcohol maintained at dry ice-acetone temperature. In this study the acrolein was collected directly in a 4-HR reagent solution.…”

Assessment of the Contribution of Chemical Species to The Eye Irritation Potential of Photochemical Smog

“…1 The difficulty in accounting for eye irritation in Los Angeles smog in terms of measured concentrations of known irritants was discussed in early work. 9 The extrapolation of laboratory results on almost any sort of biological testing of limited groups of human subjects (or test animals) to general populations is difficult to accomplish on a quantitative basis.…”

Measurements of Hydrogen Peroxide and Formaldehyde in Glendora, California

“…The presence of formaldehyde (HCHO) in Los Angeles air has been recognized since 1960 and has been associated with the intense eye irritation often observed (Renzetti and Bryan, 1961). Since that time a number of measurements of HCHO have been made in the Los Angeles area, and a review of these is contained in Carlier et al (1986).…”