Experiment: 2014 FIXCIT Study_20140110_ALPHA-PINENE/hydrogen peroxide_Hydroxyl radical_No Seed_Alpha-pinene + OH, low NO, dry, (NH4)2SO4 seed at end

Experiment

Name: 2014 FIXCIT Study_20140110_ALPHA-PINENE/hydrogen peroxide_Hydroxyl radical_No Seed_Alpha-pinene + OH, low NO, dry, (NH4)2SO4 seed at end
Date: 2014-01-10

Organization
2014 FIXCIT Study

Chamber
Seinfeld chambers

Experiment Set
FIXCIT experiments

Goals
To observe the low NOx oxidation products from OH + alpha-pinene for comparison to signals which were observed during the SOAS field campaign. Major first generation products should include the hydroxy hydroperoxide of alpha pinene, and pinonaldehyde.

Summary
The experiment appeared to go well. There was a bit of a SNAFU at the beginning, as it was realized that the chamber exhaust line was still connected about 2-3 minutes after the addition of the alpha-pinene had been started. It was disconnected at this point, however, some of the alpha-pinene may have been lost to the exhaust. However, observations after the alpha-pinene addition was complete and before adding the H2O2, (PTRMS reported 28 ppbv levels of alpha-pinene and CRM OHR reported ~50 s-1 OH reactivity) implied little of the alpha-pinene was lost to the exhaust. Thus, the experiment proceeded as planned. Particle nucleation was observed after about 1.5 hrs of oxidation by the AMS. Peak organic aerosol levels of 25 ug/m^3 were reached after about 3 hrs of oxidation. After ~5hrs of oxidation the lights were turned off, and ammonium sulfate seeds were added to the bag. This caused an increase in OA observed by the AMS.

Additional Notes
Instrument Status: TD LIF - up PTRMS - up GTHOS - up LIF OHR - up CRM OHR - up NO CL - up GLY LIP - down FOR LIF - down I/A CIMS - up NCIMS - up RHTO3 - up GC FID - down AMS - up TQC1 - up TQC2 - up TOFCIMS - up Timeline (UTC, hrs, January 10, 2014): 16:12 - Started addition of 4.4 mg alpha-pinene to the low NOx bag (6 slm zero air flowing over alpha pinene in glass vial in warm bath (30-->50C) 16:15 - Removed exhaust line from the low NOx bag 17:00 - Instruments started sampling 17:30 - Instruments stopped sampling 17:30 - Added H2O2 to low NOx bag (flowing 5 slm zero air over 120ul 50% (m:m) H2O2 within a glass trap in a 30C warm bath) 18:30 - Stopped H2O2 injection 18:45 - Instruments started sampling 19:15 - 100% lights turned on. 24:30 - 100% lights turned off. 25:35 - Begin to add nebulized aerosol seeds to the chamber (0.06M (NH4)2SO4) 26:08 - Stopped adding seeds 26:20 - Stopped sampling, flushed bag, switch GTHOS from low NOx to high NOx bag.

Experiment Details

Categories:

  • Gas phase chemical reaction
Temperature: 27
Relative Humidity: 5
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 5
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: 2.0e6 (molecules_per_cubic_centimeter)
RO2 Main Fate: HO2
RO2 Lifetime: (Seconds)
Pressure: 755

Data Sets

ID Instrument File  
1116 GTHOS_OH 20140110_OH.csv
1117 GTHOS_HO2 20140110_HO2.csv
1118 NO-CL FIX-NCAR_NO_CL-NO_Chamber_20140110_RA.csv
1119 RHTO3NOx FIX-CIT-RHTO3NOx_Chamber_20140110_RA.csv
1120 CF3O TripleQ-CIMS 20140110_TRIPCIMSmerge.csv
1121 TOF-AMS (High Resolution) 20140110_HRAMS.csv
1122 PTR-TOF-MS 20140110_PTRTOFMS.csv
1123 NO3-TOF-CIMS 20140110_NO3CIMS.csv
1124 TD-LIF D20140110_TDLIF.csv
1125 OHR-LIF 20140110_LIFOHR.csv
1126 CF3O-TOF-CIMS 20140110_TOFCIMSmerge.csv
1127 OHR-CRM 20140110_CRMOHR.csv
1128 I-TOF-CIMS 20140110_ICIMS.csv

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

Experiment Set Details

Name: FIXCIT experiments
Time format and units: Seconds past midnight
Description:
The Focused Isoprene eXperiment at the California Institute of Technology (FIXCIT) was a collaborative study at the atmospheric chambers of Caltech during January 2014. FIXCIT is the laboratory component of SOAS, and is aimed toward (1) better understanding the chemical details behind ambient observations relevant to the southeastern United States, (2) advancing the knowledge of atmospheric oxidation mechanisms of important biogenic hydrocarbons, and (3) characterizing the behavior of field instrumentation using authentic standards. A series of chamber experiments was conducted to investigate the oxidation of isoprene, α-pinene, methacrolein, pinonaldehyde, acylperoxy nitrates, isoprene hydroxy nitrates (ISOPN), isoprene hydroxy hydroperoxides (ISOPOOH), and isoprene epoxydiols (IEPOX). Pinonaldehyde and isomer-specific standards of ISOPN, ISOPOOH, and IEPOX were synthesized, enabling study of the oxidation mechanisms and instrument responses for these compounds.

Collaborators:

  • Allen H. Goldstein UC Berkeley
  • William H. Brune Penn State University
  • Ronald C. Cohen UC Berkeley
  • Delphine K. Farmer Colorado State University
  • Manjula R. Canagaratna Aerodyne
  • Douglas R. Worsnop Aerodyne
  • Jose L. Jimenez University of Colorado Boulder
  • Frank N. Keutsch Harvard
  • Saewung Kim UC Irvine
  • Alex B. Guenther UC Irvine
  • John E. Mak SUNY Stonybrook
  • Geoffrey S. Tyndall NCAR
  • Denise D. Montzka NCAR
  • Andrew J. Weinheimer NCAR
  • Alam Hasson Fresno State

Download

Download this Experiment (2.4 MB)

Contacts

Principal investigators:

Paul O. Wennberg
Phone: 626 395 2447
E-mail: wennberg@caltech.edu
OrcID: 0000-0002-6126-3854

John H. Seinfeld
Phone: 626-395-4635
E-mail: seinfeld@caltech.edu
OrcID: 0000-0003-1344-4068

John D. Crounse
Phone: 626-395-8655
E-mail: crounjd@caltech.edu
OrcID: 0000-0001-5443-729X

Tran B Nguyen
Phone: 5307525987
E-mail: tbn@ucdavis.edu
OrcID: 0000-0001-9206-4359

Data Manager:

Tran B. Nguyen
Phone: 5307525987
E-mail: tbn@ucdavis.edu

Reactants

Reactant Compound type Concentration Concentration units
ALPHA-PINENE (6654)
  • Alkene
 30 Parts Per Billion
hydrogen peroxide (784) 2 Parts Per Million

20140110_expTimeline.csv Timeline

UTC_hr Action
16:12 Started addition of 4.4 mg alpha-pinene to the low NOx bag (6 slm zero air flowing over alpha pinene in glass vial in warm bath (30-->50C)
16:15 Removed exhaust line from the low NOx bag
17:00 Instruments started sampling
17:30 Instruments stopped sampling
17:30 Added H2O2 to low NOx bag (flowing 5 slm zero air over 120ul 50% (m:m) H2O2 within a glass trap in a 30C warm bath)
18:30 Stopped H2O2 injection
18:45 Instruments started sampling
19:15 100% lights turned on.
24:30 100% lights turned off.
25:35 Begin to add nebulized aerosol seeds to the chamber (0.06M (NH4)2SO4)
26:08 Stopped adding seeds
26:20 Stopped sampling; flushed bag; switch GTHOS from low NOx to high NOx bag.

Citations
Cite this experiment: Publications associated with this experiment:

Characterizations
Light Flux Characterizations:
2013-12-16 (#17)
Particle Loss Characterizations:
2013-03-07 (#13)
Vapor Loss Characterizations:
(None)

Chamber Details

Name: Seinfeld chambers
Volume in cubic meters: 22
Shape: Rectangular Prism
Surface area in cubic meters: 48
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date:
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation
o3 background: < 0.5 ppb
nox background: 40 ppt
Particle background in micrograms per cubic meter: < 0.01 ug/m3
Air filtration method: Custom filtration canisters to remove NOx, hydrocarbons, water, particles, ozone, SOx from pressurized ambient air.
Mixing method: 1
Mixing method material: Pulsed air jets, manually actuated
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 10
Temparature range (max degrees celcius): 45
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 4
Relative humidity range (max percent): 90
Particle experiment capability: 1
Lights: Yes
Light source type(s): UV black lamps (350 nm centered)
Supplemental information: https://www.worldscientific.com/doi/abs/10.1142/9789813147355_0001
Additional Notes: