Experiment: UCR-CECERT-APL-Cocker Group_20161210_None_Ammonium sulfate_EPA2287B - Weihan


Name: UCR-CECERT-APL-Cocker Group_20161210_None_Ammonium sulfate_EPA2287B - Weihan
Date: 2016-12-10


EPA chamber

Experiment Set
Particle wall loss series experiments

PM Wall loss with blacklights on in the last hour

Atomizeing 0.02M Asmonia Sulfate INSTRUMENTS: Dual SMPS

Experiment Details


  • Instrument/Chamber characterization
Temperature: 28
Relative Humidity: 0.01
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value:
Seed Concentration Units:
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0.01
Reaction type:
Oxidant Name: None
Initial Oxidant Concentration Value: 0 (microgram_per_cubic_meter)
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: Particle wall loss series experiments
Time format and units: Time format in timeline is the absolute local time.
Historical experiments that study the particle wall loss. After EPA2418 there was a systematic study of it (Done by Chen Le).


  • Weihan Peng
  • Chen Le


Principal investigator:

David Cocker
E-mail: dcocker@engr.ucr.edu

Data Manager:

Chen Le
Phone: 9516603455
E-mail: cle030@ucr.edu

20161210_EPA2287_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
13:09 Start atomizing (NH4)2SO4 @ 10 psi
13:11 Fill air off
13:29 Start fill air to maintain pressure
15:24 Stop atomizer
15:25 Fill air off; air handler on
15:26 Internal mix for 1 min
18:00 Lights on
19:25 Lights off
21:32 End of experiment

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: