منابع مشابه
Measurement of Cl2 in coastal urban air
[1] Measurements of Cl2 in coastal urban air were made in Irvine, California from Aug.-Nov., 2005, using negative ion atmospheric pressure chemical ionization with tandem mass spectrometry. Cl2 ranged from <2.5 to 20 ppt with a two month mean of 3.5 ± 3.5 ppt (1s) and an average noon photolysis rate of 44 ppt hr 1 Cl2. Model calculations suggest that Cl2 photochemistry results in an increase of...
متن کاملDiagnostics of inductively coupled chlorine plasmas : Measurement of Cl 2 ¿ and Cl ¿ densities
The absolute densities of positive ions ~Cl2 1 and Cl! are obtained over a 2–20 mTorr pressure range and 5–1000 W input radio-frequency rf power range in a transformer-coupled Cl2 plasma. The relative number density of Cl2 1 is measured by laser-induced fluorescence. These laser-induced fluorescence data are calibrated by Langmuir-probe measurements of total positive-ion density at low powers t...
متن کاملUrban Air Pollution Exposure – Measurement, Modeling and Assessment
Exposure to air pollution in city centers is of major concern because of its health-risks to urban dwellers, trafficcorridor users and even to in-transit commuters. The steady growth in traffic is the major source of toxic air pollutants in urban centers these days. Therefore, studying exposure to air pollutants in urban centers is of special interests to environmental health scientists. This s...
متن کاملDetermination of Polycyclic Aromatic Hydrocarbons in Ambient Urban Air
Polycyclic aromatic hydrocarbons (PAHS) have been determined in the atmosphere of Isfahan, Iran. Airborne particulate matter was sampled using a high-volume air sampler at roof-top level (~6m). Extraction of PAHS from airborne particulate matter has been performed using SFE system and the relationship between the extraction temperature and the recovery of PAHS</su...
متن کاملOptical actinometry of Cl 2 , Cl , Cl ¿ , and Ar ¿ densities in inductively coupled Cl 2 – Ar plasmas
Optical emission ~OE! actinometry has been used to measure the absolute densities of Cl2, Cl, Cl , and Ar in a high-density inductively coupled ~ICP! Cl2 –Ar plasma at 18 mTorr as a function of the 13.56 MHz radio frequency ~rf! power and Ar fraction. The fractional dissociation of Cl2 to Cl increases with rf power, with the dissociated fraction increasing from 78% to 96% at 600 W ~10.6 W cm! a...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2006
ISSN: 0094-8276,1944-8007
DOI: 10.1029/2006gl025799