Identification and measurement of nitrous acid in an indoor environment

被引：76

作者：

Pitts Jr., J.N. ^{[1
]}

Wallington, T.J. ^{[1
]}

Biermann, H.W. ^{[1
]}

Winer, A.M. ^{[1
]}

机构：

[1] Statewide Air Pollution Research Center, University of California, Riverside, CA 92521, United States

来源：

Atmospheric Environment - Part A General Topics | 1985年 / 19卷 / 05期

关键词：

BUILDINGS - CARCINOGENS - NITROGEN COMPOUNDS - SPECTROSCOPY; ABSORPTION; -; VENTILATION;

D O I：

10.1016/0004-6981(85)90064-2

中图分类号：

学科分类号：

摘要：

Reported here is a direct observation by differential optical absorption spectroscopy (DOAS) of the formation of ppb levels of gaseous nitrous acid (HONO) from the reaction of ppm levels of nitrogen dioxide (NO//2) with water vapor, in an indoor environment. The rate of formation of HONO displayed first order kinetics with respect to NO//2 with a rate of (0. 25 plus or minus 0. 04) ppb min** minus **1 per ppm of NO//2 present. Assuming a lifetime of 1 hr with respect to both physical and chemical removal processes for HONO, this leads to an estimated steady state concentration of approx. 15 ppb of HONO per ppm of NO//2 present. This relatively high level of HONO associated with NO//2-air mixtures rises new questions concerning the health implications of elevated NO//2 concentrations in indoor environments, e. g. HONO is a respirable nitrite known to convert secondary amines in vitro to carcinogenic nitrosamines.

引用

页码：763 / 767