Experiment: Ng Research Group_20220704_alpha-Pinene_Nitrate radical_Ammonium sulfate_APN-3


Name: Ng Research Group_20220704_alpha-Pinene_Nitrate radical_Ammonium sulfate_APN-3
Date: 2022-07-04

Ng Research Group

Georgia Tech Environmental Chamber (Far)

Experiment Set

To derive an SOA mass yield curve for a-pinene+NO3 system.

6 uL of liquid a-pinene was injected, followed by the injection of 300 ppb of N2O5 (source of nitrate radical) at a rate of 11.3 ppb min-1.

Additional Notes
Initial oxidant concentration is the injected N2O5 concentration.

Experiment Details


  • Gas phase chemical reaction
  • Condensed-phase chemical reaction
  • Volatility and partitioning
  • Aerosol formation
Temperature: 5
Relative Humidity: 0-2
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value:
Seed Concentration Units:
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0-2
Reaction type:
Oxidant Name: Nitrate radical
Initial Oxidant Concentration Value: 300 (parts_per_billion)
RO2 Main Fate: Not Sure
RO2 Lifetime: (Seconds)

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

Experiment Set Details

Name: MultiPrecursor_Takeuchi
Time format and units: Time is either ET or in min.
To understand whether or not the formation and properties of secondary organic aerosol (SOA) in multi-precursor systems can be described linearly using respective single-precursor systems. The system to investigate is nitrate radical oxidation of a-pinene and limonene.



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
alpha-Pinene (6654)
  • Alkene
449.4 Microgram Per Cubic Meter

20220704_TimeLine.csv Timeline

Time (ET) Action
9:00 GC on
9:48 SMPS on
10:00 RHT/NOx/O3 on
10:25 Seed injection starts
10:25 VOC injection starts
10:45 VOC injection ends
10:50 Seed injection ends
12:00 N2O5 injection starts
12:26:30 N2O5 injection ends
13:30 GC off
17:00 RHT/NOx/O3 off
17:00 SMPS off

Light Flux Characterizations:
Particle Loss Characterizations:
2022-06-30 (#36)
Vapor Loss Characterizations:

Chamber Details

Name: Georgia Tech Environmental Chamber (Far)
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: