Experiment: UCR-CECERT-APL-Cocker Group_20110409_ISOPRENE/NO_Hydroxyl radical_No Seed_EPA1405B - Shun


Name: UCR-CECERT-APL-Cocker Group_20110409_ISOPRENE/NO_Hydroxyl radical_No Seed_EPA1405B - Shun
Date: 2011-04-09


EPA chamber

Experiment Set
Sara Li_Old test

Photo-oxidation of isoprene with the existence of NO

Targets: isoprene 0.2 ppm, NO 15ppb (A), 5ppb (B) INSTRUMENTS: GC1,2,SMPS,CEAS

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 0.2 Parts Per Million
  • NOx
5 Parts Per Billion

20110409_EPA 1405 Isoprene + NO_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
10:25 Shun iosprene 200 ppb both; NO 15 A 5 B
10:26 Eshan using calibrator for wood smoke experiment
10:59 Start NO|CO span flows 2.00|40.0|off|40.0
11:33 Start NO|CO span (flows unchanged) flows 2.00|40.0|off|35.0
11:56 Start GPT span flows 2.00|40.0|2.00|40.0
12:12 TECO2 NO 20.95; NOx 93.31; CO 9.74
12:13 Start O3 span flows 2.00|40.0|2.00|off
12:44 O3 #2 85.45
12:45 Start E <-> W <-> Z sampling
13:00 Inject pentafluorohexane 100 uL into both bags
13:05 Inject isoprene 140 uL into both; turn off fill air; turn on West air handler and heater
13:20 mix E <-> W for 5 minutes
13:26 Close valve 14
13:29 Inject NO 4.62 torr (207.7 L bulb) into West
13:50 Inject NO 1.62 torr (207.7 L bulb) into East
13:56 Mix bags internally for 1 minute
14:15 BL on (4 bulbs out); heater off
15:47 GPT span flows 2.00|40.0|2.00|40.0
16:08 TECO2 NO 21.04; NOx 91.80; CO 9.66
16:09 NO2|PAN NO2 194.18 and rising
16:19 W <-> E <-> Z sampling
19:41 BL off and heater on (west)
19:51 CEAS thermal decomp tube SP 300 C
20:04 400 C
20:15 500 C
20:28 off; experiment end

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: