---
experiment:
    id: '881'
    experiment_category:
        - 'Gas phase chemical reaction'
        - 'Aerosol formation'
    experiment_date: '2022-07-15'
    temperature: '22'
    relative_humidity: '65'
    seeded_experiment: '1'
    type_of_seed: 'Ammonium sulfate'
    seed_concentration_units: 'micrograms_per_cubic_meter'
    initial_seed_concentration_value: '300'
    fuchs_adjusted_surface_area: ''
    reaction_type:
        - 'Dark oxidation'
    oxidant_name: 'Nitrate radical'
    ro2_main_fate: 'RO2'
    ro2_lifetime_seconds: ''
    experiment_goals: 'To quantify SOA yield and gas-phase product yields (particularly of C10 nitrooxy-hydroperoxide and other organonitrates) from humid nighttime RO2+HO2-dominated NO3-initiated chemistry of b-ocimene.'
    experiment_summary: "The chamber was humidified, after which H2O2, NO2, and O3 were injected in the chamber and allowed to equilibrate, forming NO3 and HO2. Ammonium sulfate seed particles were injected. Then b-ocimene was injected and decayed by simultaneous reaction with ozone and NO3. Gas phase organics were monitored by CF3O- CIMS (units: normalized counts), particle formation was monitored by SMPS, and RH/T/O3/NOx were monitored throughout.\r\n\r\nO3/NOx data sometimes require post-correction not applied here, including subtraction of an ozone interference from H2O2 (1 ppm H2O2 is detected as about 12 ppb ozone) and correction for an in-line HEPA filter (see timeline for applicable timing) that scrubs about 10% of NO2 and 45% of ozone."
    additional_notes: ''
    light_flux_characterization_id: ''
    particle_loss_characterization_id: '38'
    vapor_loss_characterization_id: ''
    data_file_original_name: '220715_timeline.csv'
    oxidant_concentration_units: 'parts_per_trillion'
    initial_oxidant_concentration_value: '20'
    reactants:
        -
            is_aerosol: ''
            pubchem_cid: '3032552'
            reactant_name: 'Nitrogen Dioxide'
            not_in_pubchem: ''
            functional_group:
                - 'NOx'
            concentration_units: 'parts_per_billion'
            functional_group_other: ''
            initial_concentration_value: '120'
        -
            is_aerosol: '1'
            pubchem_cid: '6097028'
            reactant_name: 'Ammonium Sulfate'
            not_in_pubchem: ''
            functional_group:
                - 'Aerosols'
            concentration_units: 'microgram_per_cubic_meter'
            functional_group_other: ''
            initial_concentration_value: '300'
        -
            is_aerosol: ''
            pubchem_cid: '24823'
            reactant_name: 'Ozone'
            not_in_pubchem: ''
            functional_group: []
            concentration_units: 'parts_per_billion'
            functional_group_other: ''
            initial_concentration_value: '110'
        -
            is_aerosol: ''
            pubchem_cid: '784'
            reactant_name: 'Hydrogen Peroxide'
            not_in_pubchem: ''
            functional_group: []
            concentration_units: 'parts_per_million'
            functional_group_other: ''
            initial_concentration_value: '4'
        -
            is_aerosol: ''
            pubchem_cid: '18756'
            reactant_name: 'Ocimene'
            not_in_pubchem: ''
            functional_group:
                - 'Alkene'
                - 'Cycloalkene'
            concentration_units: 'parts_per_billion'
            functional_group_other: ''
            initial_concentration_value: '26'
    skip_headers_timeline: '1'
    condensation_sink_rate_coefficient: ''
    is_draft: ''
    pressure: 'approx 1 atm'
    doi: 'https://doi.org/10.5065/ereb-8090'
    download_file_path: 'experiments/EXP_881.zip'
    experiment_link: 'https://icarus.ucdavis.edu/experiment/881'
    experiment_set_name: 'Terpene nighttime chemistry'
    experiment_set_link: 'https://icarus.ucdavis.edu/experimentset/259'
    chamber_link: 'https://icarus.ucdavis.edu/chamber/552'
    chamber_name: 'Tran''s big bag of air'
    experiment_name: 'Nguyen Group_20220715_Nitrogen Dioxide/Ammonium Sulfate/Ozone/Hydrogen Peroxide/Ocimene_Nitrate radical_Ammonium sulfate'
    experiment_created_at: '2023-03-07 22:23:22'
    experiment_updated_at: '2023-03-07 22:46:16'
chamber:
    id: '552'
    name: 'Tran''s big bag of air'
    chamber_flow_mode: 'Batch'
    chamber_shape: 'Rectangular Prism'
    chamber_volume_in_cubic_meters: '10'
    chamber_surface_area_in_square_meters: '28'
    flow_through_rate_in_liters_per_minute: ''
    chamber_body_material: 'Teflon'
    chamber_body_thickness_in_mils: '2'
    bag_replacement_date: ''
    bag_replacement_frequency: 'As needed'
    chamber_cleaning_method:
        - 'Flushing with air'
        - 'Flushing with air with UV lights on'
        - 'Oxidation'
    o3_background: '< 0.5 ppb'
    nox_background: ''
    particle_background: ''
    air_filtration_method: 'Custom filtration canisters to remove NOx, hydrocarbons, water, particles, ozone, SOx from pressurized ambient air.'
    mixing_fans: '1'
    mixing_fan_material: 'Pulsed air jets, manually actuated'
    temperature_control: '1'
    temperature_measurements_recorded: '1'
    temperature_range_min_degrees_celsius: ''
    temperature_range_max_degrees_celsius: ''
    humidity_control: '1'
    humidity_measurements_recorded: '1'
    relative_humidity_range_min_percent: ''
    relative_humidity_range_max_percent: ''
    particle_experiment_capability: '1'
    lights: '1'
    light_source_type: 'UV broadband black lights (centered at 350 nm)'
    link_to_supplemental_information: ''
    additional_notes: '40-Watt, Osram/Sylvania 350nm black lights, 48? long, T12 fluorescent; 72 bulbs, 36 each on two facing walls, with UV-reflective siding on all walls. Lights are controlled via 6 panels (3 on the right wall - top, mid, bottom - and 3 equivalent on the left wall).'
    organization_id: '559'
    created_at: '2021-08-09T19:51:32.000000Z'
    updated_at: '2021-08-11T21:26:03.000000Z'
experimentSet:
    id: '259'
    name: 'Terpene nighttime chemistry'
    experiment_set_description: 'A series of experiments examining product yields and SOA formation from terpene + NO3 reactions under conditions designed to mimic the nighttime atmosphere of the Southeast US in the summer. Two types of experiments are included: (1) those in which the chemistry is initiated by additions of O3 + NO2 + H2O2, which together provide conditions closely resembling the ambient atmosphere at night (i.e., with NO3 + terpene as the dominant oxidation reaction but some O3 + terpene contribution, and with RO2 + HO2 as the dominant peroxy radical fate but an appreciable contribution from RO2 + RO2), and (2) equivalent experiments performed without NO2 as a control, so as to isolate the terpene + O3 chemistry. SOA yield experiments are performed at approximately 60% RH with hydrated ammonium sulfate seed aerosol. Filter collection experiments are performed without ammonium sulfate seed aerosol, using very high terpene loadings so as to acquire enough material for offline analysis, and using N2O5 as the NO3 precursor. Data include RH/T, particle size distributions measured by SMPS (including wall-loss corrected and un-corrected data), gas-phase organic species monitored by CF3O- CIMS, and O3 & NOx concentrations. CIMS computer was struggling during this experiment set, so some experiments may be missing data when it abruptly stopped.'
    chamber_id: '552'
    created_at: '2023-03-07T22:14:32.000000Z'
    updated_at: '2023-03-08T06:45:56.000000Z'
    time_units: 'HH:MM'
    publications: []
    downloadFileSize: '2866453'
    download_file_path: 'experimentSets/EXPSET_259.zip'
    collaborators: []
organization:
    id: '559'
    lab_name: 'Nguyen Group'
    lab_affiliation: 'UC Davis'
    lab_currently_active: '1'
    legal_constraints_statement: 'The Principal Investigator (PI) and institution retain any and all rights to the data that they generated. Use of ICARUS shared data in published materials or materials under review, including peer-reviewed publications or submissions, conference presentations, reports, and proposals, requires notification of the PI. For materials meant for dissemination that significantly depend on the data shared by specific PIs, the database user is required to offer the specific PI(s), and associated coworkers, co-authorship in said publications. When ICARUS data are used in published materials, the data should be cited and the DOI for the Experiment or Experiment Set should be provided in the Data Availability statement.'
    access_constraints_statement: 'These data are openly accessible by all registered users. Accounts are available free of charge following the registration of user information with a valid email address.'
    additional_notes: ''
    created_at: '2021-08-07T00:12:10.000000Z'
    updated_at: '2021-08-07T00:12:10.000000Z'
    pi:
        -
            name_first: 'Tran'
            name_middle: 'B.'
            name_last: 'Nguyen'
            orcid: '0000-0001-9206-4359'
            phone: '5307525987'
            email: 'tbn@ucdavis.edu'
    data_manager:
        -
            name_first: 'Kelvin'
            name_middle: 'H.'
            name_last: 'Bates'
            phone: ''
            email: 'kelvinhbates@gmail.com'

---
?Time_HH:MM_local,Action
9:28,Start humidifying
9:30,NOx/O3/RH/T monitors on
9:39,SMPS on
9:59,Stop humidifying
10:00,Inject ozone for 105 seconds followed by mixing air bursts
10:07,Inject NO2 for 23 seconds followed by mixing air bursts
10:10,Start H2O2 injection (100 uL of 50% w/w in H2O; 4 slm air; heated to 40 C)
10:10,Start atomization (0.29 g (NH4)2SO4 in 100 mL MilliQ H2O; 35 psi N2; heater wet-wall denuder to hydrate particles)
10:29,CIMS on
10:34,HEPA filter on NOx/O3 monitors
10:35,Stop atomization and H2O2 injection; mixing air bursts
10:35,NOx instrument died; restarted at 11:12 but data look bad until 11:45 or so
11:07,Start ocimene injection (1.7 uL blown in with 4 slm air over 20 min with mixing air bursts every 5 min)
14:43,HEPA filter off NOx/O3 monitors
16:00,Instruments shut down and uploaded; flush chamber