Experiment: UCR-CECERT-APL-Cocker Group_20110420_3-Ethyltoluene/hydrogen peroxide_Hydroxyl radical_No Seed_EPA1416B - Annie


Name: UCR-CECERT-APL-Cocker Group_20110420_3-Ethyltoluene/hydrogen peroxide_Hydroxyl radical_No Seed_EPA1416B - Annie
Date: 2011-04-20


EPA chamber

Experiment Set
Sara Li_Old test

Photo-oxidation of m-ethyltoluene with OH radicals under black lights.

Targets: m-ethyltoluene 100 ppb(east) 200 ppb (west) H2O2 1 ppm (both) INSTRUMENTS: GC, SMPS, AMS, VTDMA, APM

Additional Notes
east bag leaky

Experiment Details


  • Photolysis, any phase
  • Aerosol formation
  • Aerosol aging
  • Blank/Control
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
3-Ethyltoluene (12100) 100 Parts Per Billion
hydrogen peroxide (784) 1 Parts Per Million

20110420_EPA1416_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
09:35 Start NO/CO span flow 2|40|off|40
09:42 Inject perfluorohexan 100 uL to both bags
09:48 Heater and air handler on
09:57 NO 96.52; NOx 95.80; CO 9.96
09:58 Start GPT span flow 2|40|2|off
10:08 Inject H2O2 400 uL to both bags
10:17 NO 21.44; NOx 89.16; CO 9.96
10:18 Start O3 span flow 2|40|2|off
10:26 Fill air off
10:26 Mix bag E-W for 7 min
10:34 O3 #2 81.05
10:34 Start E-W sampling
10:40 Close valve 14
10:43 Inject m-ethyltoluene 96 uL to W bag
11:00 Inject m-ethyltoluene 48 uL to E bag
11:20 Mix bag internally for 1 min
12:10 BL on
21:24 BL off

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: