Experiment: Hildebrandt Ruiz Lab_20170925_ISOPRENE_Chlorine radical_N/A_low NOx_seedless


Name: Hildebrandt Ruiz Lab_20170925_ISOPRENE_Chlorine radical_N/A_low NOx_seedless
Date: 2017-09-25

Hildebrandt Ruiz Lab

LHR Chamber

Experiment Set
Isoprene + Cl

Investigate how FIGAERO data varies with seedless experiments.

Low NOx experiment between isoprene and Chlorine where several FIGAERO filter collections were done. UV lights were turned on till enough SOA was formed, then turned off immediately once SOA showed photolysis behavior (decrease in OA signal). The lights on/off was repeated again for an hour to investigate whether or not more aerosol would form.

Experiment Details


  • Gas phase chemical reaction
  • Aerosol formation
Temperature: 25
Relative Humidity: 5
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 5
Reaction type:
Oxidant Name: Chlorine radical
Initial Oxidant Concentration Value: 180 (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: Isoprene + Cl
Time format and units:
Environmental chamber experiments were carried out under low-NOx conditions with isoprene and chlorine as primary VOC and oxidant sources. Secondary organic aerosol yields were calculated upon complete isoprene consumption. Formation of particulate organochloride was tracked using an ACSM. A high-resolution time-of-flight chemical ionization mass spectrometer was used to determine the molecular composition of gas-phase species using iodide–water and hydronium–water cluster ionization.


  • Dongyu S. Wang University of Texas at Austin, now at Paul Scherrer Institute in Switzerland
  • Lea Hildebrandt Ruiz University of Texas at Austin


Principal investigator:

Lea Hildebrandt Ruiz
E-mail: lhr@che.utexas.edu
OrcID: 0000-0001-8378-1882

Data Manager:

Lea Hildebrandt Ruiz
E-mail: lhr@che.utexas.edu


Reactant Compound type Concentration Concentration units
ISOPRENE (6557) 49 Parts Per Billion


File not found...

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

Chamber Details

Name: LHR Chamber
Volume in cubic meters: 8.92
Shape: Rectangular Prism
Surface area in cubic meters: 26.4
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 5.0
Replacement date: 2018-06-15
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation
o3 background:
nox background:
Particle background in micrograms per cubic meter: < 10 counts/cm3
Air filtration method: NA
Mixing method: 0
Mixing method material:
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 5
Temparature range (max degrees celcius): 50
Humidity Control: No
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 0
Relative humidity range (max percent): 85
Particle experiment capability: 1
Lights: Yes
Light source type(s): UV-A Blacklight
Supplemental information:
Additional Notes: