Experiment: UCR-CECERT-APL-Cocker Group_20110425_3-Ethyltoluene/nitric oxide_Hydroxyl radical_No Seed_EPA1421A - Annie


Name: UCR-CECERT-APL-Cocker Group_20110425_3-Ethyltoluene/nitric oxide_Hydroxyl radical_No Seed_EPA1421A - Annie
Date: 2011-04-25


EPA chamber

Experiment Set
Sara Li_Old test

Photo-oxidation of m-ethyltoluene with NO under black lights.

Targets: m-ethyltoluene 100 ppb(both) NO 20 ppb (west) 40 ppb (east) inject formic acid to west bag at 18:58 INSTRUMENTS: SMPS, AMS, VTDMA, APM, PILS-ToF, GC

Additional Notes
West SMPS data noisy

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
3-Ethyltoluene (12100) 100 Parts Per Billion
nitric oxide (145068) 20 Parts Per Billion

20110425_EPA1421_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
09:30 NO/CO span flow 2|40|off|40
09:49 NO 95.02; NOx 93.99; CO 9.37
09:50 GPT span flow 2|40|2|40
10:05 NO 21.53; NOx 87.5; CO 9.37
10:06 O3 span flow 2|40|2|off
10:15 Inject perfluorohexane 100 uL to both bags
10:26 Oe #2 80.32
10:26 Start E-W-Z sampling
10:49 Inject m-ethyltoluene 96 uL into both bags
11:12 Air handler and heater on; fill air off
11:13 Mix bags E-W for 8 mins
11:34 Close valve 14
11:36 Inject NO 6.69 torr (.392 L) to W bag
12:00 Inject NO 6.35 torr (.2077 L) to E bag
12:37 Mix bag internally for 1 min
12:55 heater off; BL on
18:58 Inject formic acid 10 uL in W bag
21:37 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: