Experiment: Ng Research Group_20220726_Limonene_Nitrate radical_Ammonium sulfate_LIM-4


Name: Ng Research Group_20220726_Limonene_Nitrate radical_Ammonium sulfate_LIM-4
Date: 2022-07-26

Ng Research Group

Georgia Tech Environmental Chamber (Far)

Experiment Set

To evaluate the effect of limonene and N2O5 injection order on SOA mass yield. The injection order in this experiment is the same as in SEQ-1 and SEQ-2 but opposite of LIM-1, LIM-2, and LIM-3.

40 ppb of N2O5 was injected, followed by the injection of 0.38 uL of liquid limonene.

Additional Notes
Initial oxidant concentration is the injected N2O5 concentration. The limonene concentration is estimated based on the chamber volume and the limonene injection volume. In a separate day, the initial chamber volume was determined to be 11.3 m3 by injecting the known concentration of NO and NO2. The chamber volume at the time of limonene injection was estimated by subtracting the sum sampling rate of all the instruments and adding the injection rate of a-pinene, N2O5, and seed aerosol.

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: 40 (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
Limonene (22311)
  • Alkene
30.1 Microgram Per Cubic Meter

20220726_TimeLine.csv Timeline

Time (ET) Action
10:00 GC on
10:00 SMPS on
10:40 AMS on filter
11:00 AMS on chamber
11:00 RHT/NOx/O3 on
11:20 Seed injection starts
11:50 Seed injection ends
11:55 N2O5 injection starts
11:58:30 N2O5 injection ends
13:00 VOC injection starts
13:10 VOC injection ends
15:25 GC off
18:00 RHT/NOx/O3 off
18:00 SMPS off
18:00 AMS off
18:30 FIGAERO-CIMS 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: