Experiment: Ng Research Group_20170109_ALPHA-PINENE_Hydroxyl radical_1:2 MgSO4/H2SO4_60%RH


Name: Ng Research Group_20170109_ALPHA-PINENE_Hydroxyl radical_1:2 MgSO4/H2SO4_60%RH
Date: 2017-01-09

Ng Research Group

Georgia Tech Environmental Chamber (Far)

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 22 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: 25-28
Relative Humidity: 48-65
Seeded Experiment: Yes
Type of Seed: 1:2 MgSO4/H2SO4
Initial Seed Concentration Value:
Seed Concentration Units:
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 48-65
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.


  • Masayuki Takeuchi


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) 22 Parts Per Billion

20170109_TimeLine.csv Timeline

Time (ET) Action
8:09 AMS on filter
8:20 SMPS on
8:29 AMS on chamber
8:30 RHT/NOx/O3/CAPS on
8:40 GC on
8:55 Seed injection starts
9:01 VOC injection starts
9:10 Seed injection ends
9:11 VOC injection ends
9:13 H2O2 injection starts
9:34 NO injection starts
9:35 NO injection ends
9:50 H2O2 injection ends
10:00 Lights on
10:00 NO injection starts
10:10 NO injection ends
10:50 NO injection starts
11:05 NO injection ends
14:00 Lights off
14:00 RHT/NOx/O3/CAPS off
14:00 GC off
14:00 AMS off
14:00 SMPS off

Light Flux Characterizations:
Particle Loss Characterizations:
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: