Experiment: UCR-CECERT-APL-Cocker Group_20110421_ISOPRENE/H2O2_Hydroxyl radical_No Seed_EPA1417B - Chris


Name: UCR-CECERT-APL-Cocker Group_20110421_ISOPRENE/H2O2_Hydroxyl radical_No Seed_EPA1417B - Chris
Date: 2011-04-21


EPA chamber

Experiment Set
Sara Li_Old test

Photo-oxidation of isoprene with OH under black lights

Targets: isoprene 0.250 ppm both H2O2 3 ppm West 1.5 ppm East INSTRUMENTS: GC, SMPS, AMS, VTDMA, KANOMAX, PILS-ToF

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
ISOPRENE 250 Parts Per Billion
H2O2 1.5 Parts Per Million

20110421_EPA1417_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
07:27 NO/CO span flow 2|40|40|off
07:52 NO 99.95; NOx 98.34; CO 10.16
07:53 GPT span flow 2|40|2|40
08:03 NO 22.80; NOx 91.02
08:04 O3 span flow 2|40|2|off
08:14 O3 #2 82.03
08:15 Start E-W-Z sampling
08:33 Turned off fill air; turned on air handler
08:41 Inject 100 uL perfluorohexan into both bags
08:44 Inject 172.5 uL isoprene into both bags
08:56 Mix E-W for 7 mins
09:13 Closed valve 14
09:16 Inject 300 uL 50% H2O2 into E
09:29 Inject 400 uL 50% H2O2 into W
09:40 Injected 200 uL 50% H2O2 into A rtr
09:53 All blacklights on
16:36 lights 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: