Experiment: UCR-CECERT-APL-Cocker Group_20161104_SOA surrogate/NOx/ISOPRENE_Hydroxyl radical_No Seed_EPA2272A - Weihan

Experiment

Name: UCR-CECERT-APL-Cocker Group_20161104_SOA surrogate/NOx/ISOPRENE_Hydroxyl radical_No Seed_EPA2272A - Weihan
Date: 2016-11-04

Organization
UCR-CECERT-APL-Cocker Group

Chamber
EPA chamber

Experiment Set
VOC-Surrogate Experiments

Goals
Observing NO-initiated isoprene reactions under SOA surrogate and NOx environment.

Summary
Target: 1.1ppmC SOA surrogate, 25ppb Nox, 100 ppb isoprene (A) INSTRUMENTS: SMPS, GC1, AMS, VTDMA, HTDMA

Experiment Details

Categories:

  • Photolysis, any phase
Temperature: 28
Relative Humidity: 0.01
Seeded Experiment: No
Fuchs Adjusted Surface Area:
Condensation sink rate coefficient: 0.01
Reaction type:
Oxidant Name: Hydroxyl radical
Initial Oxidant Concentration Value: N/A (molecules_per_cubic_centimeter)
RO2 Main Fate: NO
RO2 Lifetime: (Seconds)
Pressure: 0.015'' H2O

Data Sets

ID Instrument File  
2458 SMPS EPA2272A_SMPS.csv
2459 VTDMA EPA2272A_VTDMA.csv
2460 Ozone Box EPA2272A_O3.csv
2461 NOx Box EPA2272A_NOx.csv
2462 SMPS - SizeD EPA2272A_SizeD.csv
2463 TC EPA2272A_Temperature.csv
2464 HTDMA EPA2272A_HTDMA.csv

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

Experiment Set Details

Name: VOC-Surrogate Experiments
Time format and units: Time format in timeline is the absolute local time.
Description:
Experiments involved with SOA surrogates.

Collaborators:

  • Weihan Peng
  • Weihua Li
  • Mary Kacarab

Download

Download this Experiment (92.89 KB)

Contacts

Principal investigator:

David Cocker
E-mail: dcocker@engr.ucr.edu


Data Manager:

Chen Le
Phone: 9516603455
E-mail: cle030@ucr.edu

Reactants

Reactant Compound type Concentration Concentration units
SOA surrogate 1.1 Parts Per Million
NOx
  • NOx
 25 Parts Per Billion
ISOPRENE (6557)
  • Aromatic
 100 Parts Per Billion

20161104_EPA2272_TimeLine.csv Timeline

Time (America/Los_Angeles) Action
6:30 NO span starts; flow 2|20|35|off
6:45 NO 74.3; NOx 74.7; CO 16.46; GPT span starts; flow 2|20|35|0.7
6:53 Fill air off; Air Handlers on; Heaters on; Chiller #1 on
6:54 Inject gas SOA sur into both bags @ 500 cc/min for 4:20
7:00 NO 51.7; NOx 72.8; CO 16.36; O3 span starts; flow 2|20|off|0.7
7:04 Inject NO 8.515 - 0.03 torr (253 cc) to both bags
7:04 Inject NO2 5.386 - 0.03 torr (207.7 cc) to both bags
7:10 Inject 66 uL SOA sur into both bags
7:13 Inject 15 uL acetaldehyde into both bags
7:15 O3 xx2 34.7; Starting E--W--Z sampling
7:23 Mix W-E bag for 9 mins
7:35 Close valve 14
7:41 Inject 33 uL isoprene into W bag
7:59 Internally mix W bag for 1 min
8:08 Heaters off; Blacklights on
8:10 Elevators on (0.016'')
14:35 End of experiment

Citations
Cite this experiment:

Characterizations
Light Flux Characterizations:
(None)
Particle Loss Characterizations:
(None)
Vapor Loss Characterizations:
(None)

Chamber Details

Name: EPA chamber
Volume in cubic meters: 84.2
Shape: Rectangular Prism
Surface area in cubic meters: 126
Flow Mode: Batch
Flow through rate in liters per minute:
Body Material: Teflon
Body thickness: 2
Replacement date: 2017-11-07
Replacement frequency: As needed
Cleaning method: Flushing with air Flushing with air with UV lights on Oxidation Wipe with ultra-pure water if needed
o3 background: 10
nox background: 0
Particle background in micrograms per cubic meter: 0
Air filtration method: The chamber is using zero air from our air purification system
Mixing method: 0
Mixing method material:
Temparature Control: Yes
Temparature measurements recorded: Yes
Temparature range (min degrees celcius): 5
Temparature range (max degrees celcius): 45
Humidity Control: Yes
Humidity Measurements Recorded: Yes
Relative humidity range (min percent): 0.01
Relative humidity range (max percent): 80
Particle experiment capability: 1
Lights: Yes
Light source type(s): 350nm UVA Black Lamps
Supplemental information:
Additional Notes: