Experiment: Jimenez Lab_20181121_Toluene/Methyl nitrite/Nitric oxide_Hydroxyl radical_Ammonium sulfate


Name: Jimenez Lab_20181121_Toluene/Methyl nitrite/Nitric oxide_Hydroxyl radical_Ammonium sulfate
Date: 2018-11-21

Jimenez Lab

1-White (1W)

Experiment Set
Gas-aerosol-wall partitioning kinetics from Liu CC 2019 (various organic and inorganic seed aerosol types)

Determine the average and individual gas-particle accommodation coefficients of reaction products formed from toluene photooxidation and contributing to SOA formation.

Toluene, Methyl nitrite, NO, and particle seed added to chamber, UV lights turned on for 10-20 sec, multifunctional products formed and some condensed to aerosol. The 10-20s UV light/photochemistry bursts were repeated 7 times. SMPS measurements of particle size distributions were conducted to determine particle formation, surface area and condensational sink rate coefficients. In this experiment reported, Aerosol-phase chemical species were measured with HR-AMS.

Additional Notes
In another repeat of this experiment discussed in Liu et al. (2019), instead of monitoring particle phase composition with AMS, the gas-phase composition was monitored with a nitrate CIMS. However that experiment is not reported in the database since the data was complex, and most gas-phase compounds used in the analysis were not identified nor quantified.

Experiment Details


  • Volatility and partitioning
Temperature: 25
Relative Humidity: 0
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value: 26.4
Seed Concentration Units: micrograms_per_cubic_meter
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: 8.5E8 (molecules_per_cubic_centimeter)
RO2 Main Fate: NO
RO2 Lifetime: 2 (Seconds)
Pressure: 830 mbar

Data Set plots
Choose a file: Choose the X-Axis:

Experiment Set Details

Name: Gas-aerosol-wall partitioning kinetics from Liu CC 2019 (various organic and inorganic seed aerosol types)
Time format and units: All times UTC. Data is in Igor time, sec since midnight 1904
Fast burst photooxidation of alkanols (high-NOx). Gas-aerosol-wall partitioning kinetics of multifunctional oxidize species generated. Determine accommodation coefficient (alpha) and effective volatility under differing seed aerosol types (differing phase and polarities, inorganic/organic, humid/dry, standards/SOA). (Liu et al., 2019). In one experiment, toluene was oxidized instead of the alkanol mixture. These data were also used for investigating activity coefficients (gamma) of the oxidized species in the different seed particles (Liu et al., 2021).



Principal investigator:

Jose L Jimenez
E-mail: jose.jimenez@colorado.edu
OrcID: https://orcid.org/0000-0001-6203-1847

Data Manager:

Anne Handschy
E-mail: cudatabasemanager@gmail.com


Reactant Compound type Concentration Concentration units
Toluene (1140)
  • Aromatic
0.78 Parts Per Million
Methyl nitrite (12231) 4 Parts Per Million
Nitric oxide (145068)
  • NOx
0.99 Parts Per Million

T202181121_Timeline.csv Timeline

Time_UTC Event
10:15 Start inject AS ~17 ug on SMPS 
11:00 End injection
11:20 Inject 50 uL toluene 
11:36 Inject 6.2 Torr NO 
11:43 Inject 12.57 Torr MeONO 
11:49:12 10s lights  Maybe made 0.4 ug OA 
12:21:17 Another 10s lights
12:56 20 s lights 
14:00:00 20 s lights (not very accurate) 
14:40:45 24s lights time approx
15:40:14 10s lights 
16:11:10 20 s lights 
16:46 AMS sampling filter (a single point ~16:45 too) 

Light Flux Characterizations:
2021-12-24 (#38)
Particle Loss Characterizations:
2021-11-04 (#32)
Vapor Loss Characterizations:
2021-11-05 (#12)

Chamber Details

Name: 1-White (1W)
Volume in cubic meters: 20
Shape: Rectangular Prism
Surface area in cubic meters: 22.65
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date: 2014-07-01
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on
o3 background: 0
nox background: 0
Particle background in micrograms per cubic meter:
Air filtration method: AADCO 737-15, Parker Balston IT0500-3560
Mixing method: 1
Mixing method material: PTFE-coated steel fan
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 4
Temparature range (max degrees celcius): 40
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 0
Relative humidity range (max percent): 85
Particle experiment capability: 1
Lights: Yes
Light source type(s): UVA Black Lamps, Visible fluorscent bulbs
Supplemental information:
Additional Notes: UV_LIGHT_TYPE: F40/350BL/ECO (40W) and FR48T12/BL-350/VHO/182 (115W) UV_LIGHT_PEAK_EMISSION_WAVELENGTH (nm): 350 (FWHM=20) VISIBLE_LIGHT_TYPE: T5HO tubes (54W) VISIBLE_LIGHT_PEAK_EMISSION_WAVELENGTH (nm): 490 Number of lights: x 115W UV tubes, y 40W UV tubes, z Vis tubes All three types of lights are evenly distributed between four walls of the chamber See light characterization metafiles for more information