Absorptivities for Infrared Determination of Peroxyacyl Nitrates.

Nitrogen Balance in Smog Chamber Studies

“…All the reactions reported were carried out in the 610 ft 3 Battelle smog chamber which has been described elsewhere. 14 For all experiments the chamber was maintained at 90° ± 3°F at a relative humidity of 50 ± 5%.…”

“…It appears that reaction (4) plays a part in H0N0 2 formation early in the experiment when the hydroxyl concentration is at its highest, however most of the nitric acid is formed after NO 2 has reached its peak and O3 has begun to accumulate. Hence reactions (1)(2)(3) are the predominant source of H0N0 2 . This observation is also supported by the fact that almost all investigators report a good nitrogen balance up to the time when NO 2 maximizes.…”

“…H0N0 2 is therefore formed homogeneously by reaction (4) and heterogeneously by reaction (3) in typical smog systems.…”

Effects of Peroxyacetyl Nitrate Alone and in Combination with Ozone in Healthy Young Women

“…Each source tank of PAN was analyzed by infrared absorption (Perkin-Elmer, 683) prior to each experimental exposure. 4 Aliquots from a single tank were diluted in a known volume to obtain known concentrations for the calibration of the gas chromatograph. The resulting calibration curve was used in obtaining the concentration in the chamber.…”

The Production of Pure Peroxyacyl Nitrates

“…The concentration may be determined by measurement with flame ionization chromatography or by infrared absorption spectrophotometry. 8 The spectrum can also be examined for the presence of impurities. An eight-hour reactor run yields enough PAN to make 1500 ppm at 100 psig in an LPO tank.…”