Experiment: UCR-CECERT-APL-Cocker Group_20110410_1-Ethyl-2-methylbenzene/H2O2_Hydroxyl radical_No Seed_EPA1406A - Annie


Name: UCR-CECERT-APL-Cocker Group_20110410_1-Ethyl-2-methylbenzene/H2O2_Hydroxyl radical_No Seed_EPA1406A - Annie
Date: 2011-04-10


EPA chamber

Experiment Set
Sara Li_Old test

Photo-oxidation of o-ethyltoluene with the existence of OH under black lights

Targets: o-ethyltoluene 100 ppb(both) H2O2 1 ppm (both) INSTRUMENTS: GC, SMPS, AMS, VTDMA, APM

Experiment Details


  • Photolysis, any phase
  • Aerosol formation
  • Aerosol aging
Temperature: 28
Relative Humidity: 0.01
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0.01
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: N/A (molecules_per_cubic_centimeter)
RO2 Main Fate: HO2
RO2 Lifetime: (Seconds)
Pressure: 0.015'' H2O

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

Experiment Set Details

Name: Sara Li_Old test
Time format and units:
To investigate the SOA yield from DEGEE in low NOx condition.



Principal investigator:

David Cocker
E-mail: dcocker@engr.ucr.edu

Data Manager:

Chen Le
Phone: 9516603455
E-mail: cle030@ucr.edu


Reactant Compound type Concentration Concentration units
1-Ethyl-2-methylbenzene 100 Parts Per Billion
H2O2 1 Parts Per Million

20110410_EPA 1406 O-ethyltoluene + H2O2_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
09:45 Target o-ethyltoluene 100 ppb H2O2 1 ppb both bags
09:46 NO/CO span starts; flow 2|60|off|60
09:55 Air handlers + heater on
10:02 Inject 100uL PF into both bags
10:03 Teco2 NO 99.95; NOx 99.22; CO 9.61
10:06 GPT span starts; flow 2|60|2.00|60.0
10:17 Inject 97uL o-ethyltoluene into both bags
10:18 Fill air off; Air Handlers on; Heaters on; Chiller #1 on
10:21 NO 21.00; NOx 91.55; CO 9.41; O3 span starts; flow 2|60|2.00|60.0
10:41 Inject 600uL H2O2 to both bags
10:42 O3 8315; Starting E--W--Z sampling
11:07 Mix W-E bag for 10 mins
11:24 Close valve 14
11:41 Heaters off; Blacklights on
17:54 Blacklights off
17:55 End of experiment (W:999s; E:999s)

Light Flux Characterizations:
Particle Loss Characterizations:
Vapor Loss Characterizations:

Chamber Details

Name: EPA chamber
Volume in cubic meters: 84.2
Shape: Rectangular Prism
Surface area in cubic meters: 126
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date: 2017-11-07
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation Wipe with ultra-pure water if needed
o3 background: 10
nox background: 0
Particle background in micrograms per cubic meter: 0
Air filtration method: The chamber is using zero air from our air purification system
Mixing method: 0
Mixing method material:
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 5
Temparature range (max degrees celcius): 45
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 0.01
Relative humidity range (max percent): 80
Particle experiment capability: 1
Lights: Yes
Light source type(s): 350nm UVA Black Lamps
Supplemental information:
Additional Notes: