Slanina, "A continuous-flow denuder
for the measurement of ambient concentrations and surface-exchange fluxes of ammonia," Atmospheric Environment A: General Topics, vol.
From 25 September 1999 to 2 February 2004, particulate [SO sub.4] was measured using the Harvard/EPA Denuder
System (HEADS), which samples inorganic gaseous and particulate species in air.
In this study, we used the annular denuder
system (ADS) as an effective air sampler to collect acidic gases and fine particles in the ambient air from June 1997 to February 1998.
J'adore cette saison oE le vent, coureur de jupons, aime a denuder
les arbres, les laissant tout nus sans retenue, sachant pertinemment que le printemps suivant, elegant galant, leur offrira de somptueux vetements pour feter la vie et chanter le changement.
C'est la ou l'auteur joint l'agreable au sublime, chante et fait chanter ses mots, fait appel a la magie du verbe pour le denuder
et faire surgir son charme englouti par le silence.
(2010), with the exception that the ozone and components of nitrogen oxides ([NO.sub.x]) of the gaseous fraction of the atmosphere were removed using a spent honeycomb carbon denuder
. The denuder
removed ozone and most [NO.sub.x] while allowing the hydrocarbon portion to pass through.
The first was a real-time total ambient mass sampler (RAMS), based on diffusion denuder
, Nafion (Perma Pure LLC, Toms River, NJ) dryer, and TEOM monitor technology.
We used a parallel plate denuder
containing carbon-impregnated papers for the spring-summer 1998 study homes to remove vapor-phase organic carbon before particle collection; use of this denuder
was discontinued after extensive field testing indicated that the denuder
efficiency was significantly < 100% (34).
Sulfate concentrations were determined from 24-hr [PM.sub.2.5] Harvard Impactor (with the addition of a citric acid-coated honeycomb denuder
for acidity sampling) measurements taken on a daily basis during winter 1991 and every second day after 1995.
To facilitate their detection in ambient air, one needs to consider various factors involved in their sampling under field conditions: (a) relative humidity, (b) sampling time, (c) collection (derivatization) efficiency, and (d) [O.sub.3] denuders
that oxidize NO to N[O.sub.2].
Lindqvist, "Sampling and determination of gaseous and particulate mercury in the atmosphere using cold-coated denuders
," Water, Air, and Soil Pollution, vol.
Para los gases inorganicos se utilizaron dos procedimientos de muestreo y analisis: 1) Las muestras fueron recolectadas con un tren de dos "denuders
" anulares colocados en serie y recubiertos con NaOH (1% en etanol).
Particles were also collected on filters and gaseous components by denuders
. The nucleopore filters were used for collection the particles for SEM imaging.