Experiment: UCR-CECERT-APL-Cocker Group_20180731_M-XYLENE/nitric oxide_Hydroxyl radical_No Seed_EPA2370B - Chen Le


Name: UCR-CECERT-APL-Cocker Group_20180731_M-XYLENE/nitric oxide_Hydroxyl radical_No Seed_EPA2370B - Chen Le
Date: 2018-07-31


EPA chamber

Experiment Set
m-Xylene Calibration Experiments

Calibrate the chamber's operation status.

Targets: 80 ppb m-xylene + 50 ppb NO(both) Instruments: SMPS, APM, VTDMA, GC1

Additional Notes
Inject NO using the small range(which works).

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: m-Xylene Calibration Experiments
Time format and units: Time format in timeline is the absolute local time.
m-Xylene calibration experiments along the lab history. Includes: EPA2370 EPA2


  • APL student members


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
M-XYLENE (7929)
  • Aromatic
80 Parts Per Billion
nitric oxide (145068)
  • NOx
50 Parts Per Billion

20180731_EPA2370_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
8:08 NO span starts; flow 2|20|35|off
8:19 NO 76.5; NOx 78.7; GPT span starts; flow 2|20|35|0.7
8:27 NO 54.7; NOx 77.7; O3 span starts; flow 2|20|off|0.7
8:41 O3 34.8; Starting E--W--Z sampling
8:42 Fill air off; Air Handlers on; Heaters on; Chiller #1 on
8:50 Inject 65uL m-xylene into both bags
8:55 Inject 100uL PFH into both bags
9:12 Inject NO 8.93-0.00 torr (370 cc) to both bags
9:24 Mix W-E bag for 3 mins; 54ppb NO 57 ppb NO2
9:55 Inject NO 8.90-0.00 torr (370 cc) to both bags
10:06 Mix W-E bag for 10 mins
10:16 Close valve 14
10:19 Heaters off; Blacklights on (50 out)
10:22 Elevators on (0.0165'')
17:17 End of experiment (W:240 E:274)

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: