Experiment: Ng Research Group_20171010_ALPHA-PINENE_Hydroxyl radical_Ammonium sulfate_60%RH


Name: Ng Research Group_20171010_ALPHA-PINENE_Hydroxyl radical_Ammonium sulfate_60%RH
Date: 2017-10-10

Ng Research Group

Georgia Tech Environmental Chamber (Near)

Experiment Set
Monoterpene ON_Takeuchi

To characterize particulate organic nitrate generated from photooxidation of a-pinene in moderate NO level and to understand its hydrolysis process.

SOA including particulate organic nitrate formed upon UV light on by injecting 28 ppb a-pinene and 2 ppm H2O2, and keeping NO level at around 50 ppb by continuous injection.

Additional Notes
Used to compare with the same experiment but in dry condition.

Experiment Details


  • Condensed-phase chemical reaction
  • Aerosol formation
Temperature: 22-24
Relative Humidity: 53-66
Seeded Experiment: Yes
Type of Seed: Ammonium sulfate
Initial Seed Concentration Value:
Seed Concentration Units:
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 53-66
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: 2 (parts_per_million)
RO2 Main Fate: NO
RO2 Lifetime: (Seconds)

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

Experiment Set Details

Name: Monoterpene ON_Takeuchi
Time format and units: Time is either ET or in min
To characterize particulate organic nitrate generated from photooxidation and NO3 oxidation of a-pinene and b-pinene and to understand its hydrolysis process.



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 (319064711) 28 Parts Per Billion

20171010_TimeLine.csv Timeline

Time (ET) Action
15:20 SMPS on
15:40 AMS on filter
16:00 AMS on chamber
16:00 RHT/NOx/O3 on
16:30 GC on
16:32 Seed injection starts
16:36 VOC injection starts
16:46 VOC injection ends
16:52 Seed injection ends
16:55 H2O2 injection starts
17:28 H2O2 injection ends
17:30 NO injection starts
18:00 Lights on
20:55 NO injection ends
22:30 GC off
4:00 Lights off
4:00 RHT/NOx/O3 off
4:00 AMS off
4:00 SMPS 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: