Experiment: UCR-CECERT-APL-Cocker Group_20150202_2-METHYLNAPHTHALENE/H2O2/M-XYLENE_Hydroxyl radical_No Seed_EPA2018A - Candice


Name: UCR-CECERT-APL-Cocker Group_20150202_2-METHYLNAPHTHALENE/H2O2/M-XYLENE_Hydroxyl radical_No Seed_EPA2018A - Candice
Date: 2015-02-02


EPA chamber

Experiment Set
Sara Li_Old test

Photo-oxidation of two VOCs with OH under black lights.

Target: 2-methylnaphthalene 30 ppb+H2O2 1 ppm (both) +m-xylene 90 ppb(A) INSTRUMENTS: SMPS, GC1, AMS, APM, SYFT

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: Not Sure
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
2-METHYLNAPHTHALENE (7055) 30 Parts Per Billion
H2O2 1 Parts Per Million
M-XYLENE (7929) 90 Parts Per Billion

20150202_EPA2018_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
07:39 NO span starts; flow 2|20|35|off
07:55 NO 89.89; NOx 89.36; CO 15.19; GPT span starts; flow 2|20|35|0.7
08:11 NO 61.04; NOx 87.40; CO 15.19; O3 span starts; flow 2|20|off|0.7
08:20 Fill air off; Air Handlers on; Heaters on; Chiller #1 on
08:24 Inject 100 uL PFH into both bags
08:34 Inject 31.7 mg 2-methylnaphthalene into both bags @ 60 *C; 10 lpm
08:39 O3 34.67; Starting E--W--Z sampling
09:00 Inject 400 uL H2O2 into both bags @ 69 *C; 10 lpm
09:19 Mix bags E-W for 10 mins
09:34 Close valve 14
09:38 Inject 36 uL m-xylene into W bag
09:48 Mix W bag internally for 1 min
09:58 BL on; heater off
18:09 BL off; air handlers off; W 26; E 262

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: