Purnendu K. Dasgupta

TL;DR: For instance, during the Carbonaceous Species Methods Comparison Study at Glendora, CA, six groups made independent measurements of ambient formaldehyde concentrations during the period August 11-21, 1986 as mentioned in this paper.

TL;DR: In this paper, the measurement of nitrogen dioxide at the parts-perbillion level is described, where two optical fibers placed on opposite sides of and in contact with a liquid film (14-57 μL in volume) supported on a U-shaped wire guide and two tubular conduits.

TL;DR: In this article, four designs of a wet denuder are described, and performance data for one design coupled to an ion chromatograph are presented, which permits efficient removal of soluble gases for their determination at sub-ppbv levels.

TL;DR: In this paper, the authors measured ambient formaldehyde (HCHO) concentrations using a fluorometric instrument based on a diffusion scrubber and the Hantzsch reaction; hydrocarbons were simultaneously measured using gas chromatography-mass spectrometry (GC-MS).

TL;DR: Using IC-MS-MS analysis and replicate oxidation experiments, this work clearly demonstrates the relative potential of Cl(-) precursors in perchlorate production and the likely importance of dry aerosol oxidation over solution phase reactions and suggests that ClO(2)(-) may be a key intermediate while Cl(3)(-) and OCl(-) are unlikely to play a significant role.