Experiment: Ng Research Group_20150417_a-Pinene_Nitrate radical_Ammonium sulfate


Name: Ng Research Group_20150417_a-Pinene_Nitrate radical_Ammonium sulfate
Date: 2015-04-17

Ng Research Group

Georgia Tech Environmental Chamber (Near)

Experiment Set

The comparison of photochemical aging effect on SOA formed from monoterpenes + NO3 reaction

Compared to b-pinene, a-pinene+NO3 shows low SOA loading & drastic SOA change when lights are on.

Experiment Details


  • Gas phase chemical reaction
  • Condensed-phase chemical reaction
  • Multiphase chemical reaction
  • Aerosol formation
  • Aerosol aging
Temperature: 25
Relative Humidity: 53
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value: 13950.2
Seed Concentration Units: particles_per_cubic_meter
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 53
Reaction type:
Oxidant Name: Nitrate radical
Initial Oxidant Concentration Value: NA (parts_per_billion)
RO2 Main Fate: HO2
RO2 Lifetime: (Seconds)

Data Set plots
Choose a file: Choose the X-Axis:

Experiment Set Details

Name: AP+NO3_Nah
Time format and units: hh:mm
Photochemical aging of a-pinene+NO3 SOA



Principal investigator:

Nga (Sally) Lee Ng
E-mail: ng@chbe.gatech.edu
OrcID: 0000-0001-8460-4765

Data Manager:

Taekyu Joo
Phone: (404) 385-2149
E-mail: tjoo6@gatech.edu


Reactant Compound type Concentration Concentration units
a-Pinene (11240513) 12 Parts Per Billion

20150417_ap_NO3_TimeLine.csv Timeline

Time (America/New York) Action
8:15 RHT/NOx/O3 on
8:34 AMS on filter
9:05 AMS on chamber
8:15 SMPS on
10:13 CIMS on
12:29 Oxidant injection starts
12:36 Oxidant injection ends
11:32 VOC injection starts
11:42 VOC injection ends
10:53 Seed injection starts
11:08 Seed injection ends
10:13 Time background starts
15:00 Lights on
15:38 Lights off

Light Flux Characterizations:
Particle Loss Characterizations:
Vapor Loss Characterizations:

Chamber Details

Name: Georgia Tech Environmental Chamber (Near)
Volume in cubic meters: 12.6
Surface area in cubic meters: 32.48865
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness:
Replacement date: 2017-02-07
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on
o3 background: 3
nox background: 1
Particle background in micrograms per cubic meter:
Air filtration method: Pure air generator with membrane filter dryer
Mixing method: 0
Mixing method material:
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 4
Temparature range (max degrees celcius): 40
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 2
Relative humidity range (max percent): 70
Particle experiment capability: 1
Lights: Yes
Light source type(s): UVA Black Lamps, Natural Sunlight
Supplemental information:
Additional Notes: