---
instrument_id: '385'
data_file_original_name: 'EPA2273A_VTDMA.csv'
skip_headers: '1'
charts: ''
headers:
    - 'Local_Time_PST'
    - 'Experimental_Time_min'
    - 'Volume_Fraction_Remaining_unitless'
dataset_id: '2838'
experiment_link: 'https://icarus.ucdavis.edu/chambers/539/experiments/328'
experiment_set_link: 'https://icarus.ucdavis.edu/chambers/539/experimentSets/189'
chamber_link: 'https://icarus.ucdavis.edu/chambers/539'
dataset_created_at: '2021-08-26 12:53:43'
dataset_updated_at: '2021-08-26 12:53:43'
instrument_link: 'https://icarus.ucdavis.edu/chambers/539/instruments/385'
instrument:
    id: '385'
    short_name: 'VTDMA'
    full_name: 'Volatility Tandem Differential Mobility Analyzer'
    manufacturer: 'Home-made'
    model: 'TSI3081, TSI3771, Thermal Denuder 9999'
    year: '2006'
    data_recording_software: 'Labview Program'
    data_analysis_software: 'Custom MATLAB script'
    raw_data_time_resolution: '1s'
    analysis_data_averaging: '180s to 600s'
    detection_limit: 'N/A'
    quantification_limit: ''
    sensitivity_to_temperature: 'N/A'
    sensitivity_to_relative_humidity: 'N/A'
    sampling_method: 'Direct gas sampling'
    sample_preparation_method: 'None'
    sample_residence_time_in_seconds: ''
    length_of_tubing_in_cm: ''
    flow_rate: 'Sheath 2.5 lpm; Main 0.25 lpm'
    tubing_material: 'Copper'
    chemical_identification_method: 'None'
    data_analysis_method: 'The VTDMA data that were recorded in scanning mode are analyzed using a custom MATLAB script. Particle size distribution, as a function of time are displayed. Volatility is calculated by the size difference of the selected particles after the 1st and 2nd DMA.'
    quantification_method: 'Signal strength is converted to partial number/size distribution by designed transfer functions. Concentration is not important for this instrument but the sizes selected by the two DMAs.'
    calibration_method: 'Atomizing Ammonium Sulfate Aerosol into the system with the Thermodenuder off and check the scanning size with the first DMA under different measuring modes.'
    calibration_drift_estimate: 'No estimate'
    calibration_schedule: 'Annually'
    uncertainty_estimation_method: 'Duplication of the same experimental conditions.'
    known_interferences: 'N/A'
    link_to_supplemental_information: 'N/A'
    additional_notes: 'The residence time for particle flow through the thermal denuder is 17s.'
    organization_id: '547'
    created_at: '2020-02-25T09:19:33.000000Z'
    updated_at: '2020-03-27T09:18:43.000000Z'
    column_descriptors: "(b) Experimental_Time = relative time, t=0 is defined as the start of the reaction (dark) or light given time (BL/Arc); \r\n(c) Volume_Fraction_Remaining = Index for particle qualitative volatility (the fraction of the volume remained after going through the thermal denuder)."
    sampling_protocol: 'Online'
    skip_headers: '1'
    tubing_inner_diameter: '1/4'''' OD; 0.152'''' ID'
    what_is_measured: 'Particle Volatility'
    measurement_uncertainty: '(a) Local_Time (N/A); (b) Experimental_Time (N/A); (c) Volume_Fraction_Remaining (+/- ?%)'
    measurement_units: '(a) Local_Time (N/A); (b) Experimental_Time (min); (c) Volume_Fraction_Remaining (N/A)'

---
Local_Time_PST,Experimental_Time_min,Volume_Fraction_Remaining_unitless
11/6/2016 10:21:00 AM,-8.99999999790452,0
11/6/2016 10:22:00 AM,-8.00000000512227,0
11/6/2016 10:24:00 AM,-5.99999999860302,1.177
11/6/2016 10:25:00 AM,-4.99999999534339,0
11/6/2016 10:27:00 AM,-2.99999999930151,0
11/6/2016 10:28:00 AM,-1.99999999604188,0
11/6/2016 10:30:00 AM,0,1.616
11/6/2016 10:31:00 AM,1.00000000325963,1.662
11/6/2016 10:33:00 AM,2.99999999930151,0.511
11/6/2016 10:34:00 AM,4.00000000256114,0
11/6/2016 10:35:00 AM,4.99999999534339,0
11/6/2016 10:37:00 AM,7.00000000186265,0
11/6/2016 10:38:00 AM,8.00000000512227,0
11/6/2016 10:40:00 AM,10.0000000011642,0
11/6/2016 10:41:00 AM,11.0000000044238,1.111
11/6/2016 10:43:00 AM,13.0000000004657,0.213
11/6/2016 10:44:00 AM,14.0000000037253,0
11/6/2016 10:46:00 AM,15.9999999997672,0.472
11/6/2016 10:47:00 AM,17.0000000030268,0.275
11/6/2016 10:48:00 AM,17.999999995809,0
11/6/2016 10:50:00 AM,20.0000000023283,0
11/6/2016 10:51:00 AM,20.9999999951106,0
11/6/2016 10:53:00 AM,23.0000000016298,1.059
11/6/2016 10:54:00 AM,24.0000000048894,0
11/6/2016 10:56:00 AM,26.0000000009313,0.221
11/6/2016 10:57:00 AM,27.000000004191,0.566
11/6/2016 10:59:00 AM,29.0000000002328,1.613
11/6/2016 11:00:00 AM,30.0000000034925,0.859
11/6/2016 11:01:00 AM,30.9999999962747,0
11/6/2016 11:03:00 AM,33.000000002794,0
11/6/2016 11:04:00 AM,33.9999999955762,0.206
11/6/2016 11:06:00 AM,36.0000000020955,0.075
11/6/2016 11:07:00 AM,36.9999999948777,0.196
11/6/2016 11:09:00 AM,39.000000001397,0.219
11/6/2016 11:10:00 AM,40.0000000046566,0.208
11/6/2016 11:12:00 AM,42.0000000006985,0.056
11/6/2016 11:13:00 AM,43.0000000039581,0.06
11/6/2016 11:14:00 AM,43.9999999967404,0.166
11/6/2016 11:16:00 AM,46.0000000032596,0.169
11/6/2016 11:17:00 AM,46.9999999960419,0.185
11/6/2016 11:19:00 AM,49.0000000025611,0.189
11/6/2016 11:20:00 AM,49.9999999953434,0.201
11/6/2016 11:22:00 AM,52.0000000018626,0.189
11/6/2016 11:23:00 AM,53.0000000051223,0.189
11/6/2016 11:25:00 AM,55.0000000011642,0.191
11/6/2016 11:26:00 AM,56.0000000044238,0.205
11/6/2016 11:27:00 AM,56.999999997206,0.205
11/6/2016 11:29:00 AM,59.0000000037253,0.202
11/6/2016 11:30:00 AM,59.9999999965075,0.2
11/6/2016 11:32:00 AM,62.0000000030268,0.191
11/6/2016 11:33:00 AM,62.999999995809,0.209
11/6/2016 11:35:00 AM,65.0000000023283,0.213
11/6/2016 11:36:00 AM,65.9999999951106,0.216
11/6/2016 11:37:00 AM,66.9999999983702,0.087
11/6/2016 11:39:00 AM,69.0000000048894,0.09
11/6/2016 11:40:00 AM,69.9999999976717,0.221
11/6/2016 11:42:00 AM,72.000000004191,0.221
11/6/2016 11:43:00 AM,72.9999999969732,0.228
11/6/2016 11:45:00 AM,75.0000000034925,0.22
11/6/2016 11:46:00 AM,75.9999999962747,0.223
11/6/2016 11:48:00 AM,78.000000002794,0.244
11/6/2016 11:49:00 AM,78.9999999955762,0.227
11/6/2016 11:50:00 AM,79.9999999988358,0.227
11/6/2016 11:52:00 AM,81.9999999948777,0.225
11/6/2016 11:53:00 AM,82.9999999981374,0.25
11/6/2016 11:55:00 AM,85.0000000046566,0.568
11/6/2016 11:56:00 AM,85.9999999974389,0.582
11/6/2016 11:58:00 AM,88.0000000039581,0.247
11/6/2016 11:59:00 AM,88.9999999967404,0.241
11/6/2016 12:01:00 PM,91.0000000032596,0.24
11/6/2016 12:02:00 PM,91.9999999960419,0.241
11/6/2016 12:03:00 PM,92.9999999993015,0.051
11/6/2016 12:05:00 PM,94.9999999953434,0.052
11/6/2016 12:06:00 PM,95.999999998603,0.253
11/6/2016 12:08:00 PM,98.0000000051223,0.249
11/6/2016 12:09:00 PM,98.9999999979045,0.243
11/6/2016 12:11:00 PM,101.000000004424,0.257
11/6/2016 12:12:00 PM,101.999999997206,0.501
11/6/2016 12:14:00 PM,104.000000003725,0.426
11/6/2016 12:15:00 PM,104.999999996508,0.257
11/6/2016 12:16:00 PM,105.999999999767,0.25
11/6/2016 12:18:00 PM,107.999999995809,0.249
11/6/2016 12:19:00 PM,108.999999999069,0.263
11/6/2016 12:21:00 PM,110.999999995111,0.242
11/6/2016 12:22:00 PM,111.99999999837,0.253
11/6/2016 12:24:00 PM,114.000000004889,0.261
11/6/2016 12:25:00 PM,114.999999997672,0.257
11/6/2016 12:26:00 PM,116.000000000931,0.253
11/6/2016 12:28:00 PM,117.999999996973,0.251
11/6/2016 12:29:00 PM,119.000000000233,0.13
11/6/2016 12:31:00 PM,120.999999996275,0.139
11/6/2016 12:32:00 PM,121.999999999534,0.269
11/6/2016 12:34:00 PM,123.999999995576,0.263
11/6/2016 12:35:00 PM,124.999999998836,0.276
11/6/2016 12:37:00 PM,126.999999994878,0.273
11/6/2016 12:38:00 PM,127.999999998137,0.544
11/6/2016 12:39:00 PM,129.000000001397,0.445
11/6/2016 12:41:00 PM,130.999999997439,0.27
11/6/2016 12:42:00 PM,132.000000000698,0.256
11/6/2016 12:44:00 PM,133.99999999674,0.273
11/6/2016 12:45:00 PM,135,0.264
11/6/2016 12:47:00 PM,136.999999996042,0.258
11/6/2016 12:48:00 PM,137.999999999302,0.256
11/6/2016 12:50:00 PM,139.999999995343,0.272
11/6/2016 12:51:00 PM,140.999999998603,0.277
11/6/2016 12:52:00 PM,142.000000001863,0.275
11/6/2016 12:54:00 PM,143.999999997905,0.271
11/6/2016 12:55:00 PM,145.000000001164,0.14
11/6/2016 12:57:00 PM,146.999999997206,0.142
11/6/2016 12:58:00 PM,148.000000000466,0.287
11/6/2016 1:00:00 PM,149.999999996508,0.283
11/6/2016 1:01:00 PM,150.999999999767,0.275
11/6/2016 1:03:00 PM,152.999999995809,0.268
11/6/2016 1:04:00 PM,153.999999999069,0.298
11/6/2016 1:05:00 PM,155.000000002328,0.28
11/6/2016 1:07:00 PM,156.99999999837,0.276
11/6/2016 1:08:00 PM,158.00000000163,0.271
11/6/2016 1:10:00 PM,159.999999997672,0.284
11/6/2016 1:11:00 PM,161.000000000931,0.28
11/6/2016 1:13:00 PM,162.999999996973,0.282
11/6/2016 1:14:00 PM,164.000000000233,0.285
11/6/2016 1:16:00 PM,165.999999996275,0.269
11/6/2016 1:17:00 PM,166.999999999534,0.285
11/6/2016 1:18:00 PM,168.000000002794,0.274
11/6/2016 1:20:00 PM,169.999999998836,0.292
11/6/2016 1:21:00 PM,171.000000002095,0.271
11/6/2016 1:23:00 PM,172.999999998137,0.292
11/6/2016 1:24:00 PM,174.000000001397,0.284
11/6/2016 1:26:00 PM,175.999999997439,0.291
11/6/2016 1:27:00 PM,177.000000000698,0.28
11/6/2016 1:28:00 PM,178.000000003958,0.296
11/6/2016 1:30:00 PM,180,0.289
11/6/2016 1:31:00 PM,181.00000000326,0.286
11/6/2016 1:33:00 PM,182.999999999302,0.276
11/6/2016 1:34:00 PM,184.000000002561,0.278
11/6/2016 1:36:00 PM,185.999999998603,0.279
11/6/2016 1:37:00 PM,187.000000001863,0.285
11/6/2016 1:39:00 PM,188.999999997905,0.283
11/6/2016 1:40:00 PM,190.000000001164,0.292
11/6/2016 1:41:00 PM,191.000000004424,0.287
11/6/2016 1:43:00 PM,193.000000000466,0.288
11/6/2016 1:44:00 PM,194.000000003725,0.293
11/6/2016 1:46:00 PM,195.999999999767,0.296
11/6/2016 1:47:00 PM,197.000000003027,0.29
11/6/2016 1:49:00 PM,198.999999999069,0.28
11/6/2016 1:50:00 PM,200.000000002328,0.299
11/6/2016 1:52:00 PM,201.99999999837,0.293
11/6/2016 1:53:00 PM,203.00000000163,0.291
11/6/2016 1:54:00 PM,204.000000004889,0.289
11/6/2016 1:56:00 PM,206.000000000931,0.3
11/6/2016 1:57:00 PM,207.000000004191,0.3
11/6/2016 1:59:00 PM,209.000000000233,0.286
11/6/2016 2:00:00 PM,210.000000003492,0.298
11/6/2016 2:02:00 PM,211.999999999534,0.29
11/6/2016 2:03:00 PM,213.000000002794,0.288
11/6/2016 2:05:00 PM,214.999999998836,0.288
11/6/2016 2:06:00 PM,216.000000002095,0.284
11/6/2016 2:07:00 PM,216.999999994878,0.284
11/6/2016 2:09:00 PM,219.000000001397,0.286
11/6/2016 2:10:00 PM,220.000000004657,0.289
11/6/2016 2:12:00 PM,222.000000000698,0.293
11/6/2016 2:13:00 PM,223.000000003958,0.289
11/6/2016 2:15:00 PM,225,0.292
11/6/2016 2:16:00 PM,226.00000000326,0.291
11/6/2016 2:18:00 PM,227.999999999302,0.291
11/6/2016 2:19:00 PM,229.000000002561,0.297
11/6/2016 2:20:00 PM,229.999999995343,0.309
11/6/2016 2:22:00 PM,232.000000001863,0.293
11/6/2016 2:23:00 PM,233.000000005122,0.305
11/6/2016 2:25:00 PM,235.000000001164,0.302
11/6/2016 2:26:00 PM,236.000000004424,0.299
11/6/2016 2:28:00 PM,238.000000000466,0.292
11/6/2016 2:29:00 PM,239.000000003725,0.292
11/6/2016 2:30:00 PM,239.999999996508,0.299
11/6/2016 2:32:00 PM,242.000000003027,0.305
11/6/2016 2:33:00 PM,242.999999995809,0.303
11/6/2016 2:35:00 PM,245.000000002328,0.31
11/6/2016 2:36:00 PM,245.999999995111,0.31
11/6/2016 2:38:00 PM,248.00000000163,0.303
11/6/2016 2:39:00 PM,249.000000004889,0.281
11/6/2016 2:41:00 PM,251.000000000931,0.297
11/6/2016 2:42:00 PM,252.000000004191,0.302
11/6/2016 2:43:00 PM,252.999999996973,0.31
11/6/2016 2:45:00 PM,255.000000003492,0.298
11/6/2016 2:46:00 PM,255.999999996275,0.295
11/6/2016 2:48:00 PM,258.000000002794,0.281
11/6/2016 2:49:00 PM,258.999999995576,0.298
11/6/2016 2:51:00 PM,261.000000002095,0.3
11/6/2016 2:52:00 PM,261.999999994878,0.292
11/6/2016 2:54:00 PM,264.000000001397,0.293
11/6/2016 2:55:00 PM,265.000000004657,0.296
11/6/2016 2:56:00 PM,265.999999997439,0.168
11/6/2016 2:58:00 PM,268.000000003958,0.214
11/6/2016 2:59:00 PM,268.99999999674,0.312
11/6/2016 3:01:00 PM,271.00000000326,0.297
11/6/2016 3:02:00 PM,271.999999996042,0.305
11/6/2016 3:04:00 PM,274.000000002561,0.304
11/6/2016 3:05:00 PM,274.999999995343,0.291
11/6/2016 3:07:00 PM,277.000000001863,0.304
11/6/2016 3:08:00 PM,278.000000005122,0.307
11/6/2016 3:09:00 PM,278.999999997905,0.316
11/6/2016 3:11:00 PM,281.000000004424,0.299
11/6/2016 3:12:00 PM,281.999999997206,0.3
11/6/2016 3:14:00 PM,284.000000003725,0.303
11/6/2016 3:15:00 PM,284.999999996508,0.308
11/6/2016 3:17:00 PM,287.000000003027,0.299
11/6/2016 3:18:00 PM,287.999999995809,0.31
11/6/2016 3:19:00 PM,288.999999999069,0.292
11/6/2016 3:21:00 PM,290.999999995111,0.308
11/6/2016 3:22:00 PM,291.99999999837,0.31
11/6/2016 3:24:00 PM,294.000000004889,0.319
11/6/2016 3:25:00 PM,294.999999997672,0.3
11/6/2016 3:27:00 PM,297.000000004191,0.299
11/6/2016 3:28:00 PM,297.999999996973,0.341
11/6/2016 3:30:00 PM,300.000000003492,0.303
11/6/2016 3:31:00 PM,300.999999996275,0.3
11/6/2016 3:32:00 PM,301.999999999534,0.297
11/6/2016 3:34:00 PM,303.999999995576,0.311
11/6/2016 3:35:00 PM,304.999999998836,0.331
11/6/2016 3:37:00 PM,306.999999994878,0.314
11/6/2016 3:38:00 PM,307.999999998137,0.317
11/6/2016 3:40:00 PM,310.000000004657,0.301
11/6/2016 3:41:00 PM,310.999999997439,0.301
11/6/2016 3:43:00 PM,313.000000003958,0.298
11/6/2016 3:44:00 PM,313.99999999674,0.304
11/6/2016 3:45:00 PM,315,0.295
11/6/2016 3:47:00 PM,316.999999996042,0.314
11/6/2016 3:48:00 PM,317.999999999302,0.313
11/6/2016 3:50:00 PM,319.999999995343,0.318
11/6/2016 3:51:00 PM,320.999999998603,0.302
11/6/2016 3:53:00 PM,323.000000005122,0.317
11/6/2016 3:54:00 PM,323.999999997905,0.311
11/6/2016 3:56:00 PM,326.000000004424,0.299
11/6/2016 3:57:00 PM,326.999999997206,0.29
11/6/2016 3:58:00 PM,328.000000000466,0.313
11/6/2016 4:00:00 PM,329.999999996508,0.32
11/6/2016 4:01:00 PM,330.999999999767,0.308
11/6/2016 4:03:00 PM,332.999999995809,0.319
11/6/2016 4:04:00 PM,333.999999999069,0.307
11/6/2016 4:06:00 PM,335.999999995111,0.305
11/6/2016 4:07:00 PM,336.99999999837,0.307
11/6/2016 4:09:00 PM,339.000000004889,0.305
11/6/2016 4:10:00 PM,339.999999997672,0.309
11/6/2016 4:11:00 PM,341.000000000931,0.305
11/6/2016 4:13:00 PM,342.999999996973,0.316
11/6/2016 4:14:00 PM,344.000000000233,0.294
11/6/2016 4:16:00 PM,345.999999996275,0.314
11/6/2016 4:17:00 PM,346.999999999534,0.309
11/6/2016 4:19:00 PM,348.999999995576,0.312
11/6/2016 4:20:00 PM,349.999999998836,0.306
11/6/2016 4:21:00 PM,351.000000002095,0.306
11/6/2016 4:23:00 PM,352.999999998137,0.207
11/6/2016 4:24:00 PM,354.000000001397,0.201
11/6/2016 4:26:00 PM,355.999999997439,0.31
11/6/2016 4:27:00 PM,357.000000000698,0.311
11/6/2016 4:29:00 PM,358.99999999674,0.347
11/6/2016 4:30:00 PM,360,0.305
11/6/2016 4:32:00 PM,361.999999996042,0.298
11/6/2016 4:33:00 PM,362.999999999302,0.305
11/6/2016 4:34:00 PM,364.000000002561,0.331
11/6/2016 4:36:00 PM,365.999999998603,0.312
11/6/2016 4:37:00 PM,367.000000001863,0.315
11/6/2016 4:39:00 PM,368.999999997905,0.323
11/6/2016 4:40:00 PM,370.000000001164,0.337
11/6/2016 4:42:00 PM,371.999999997206,0.318
11/6/2016 4:43:00 PM,373.000000000466,0.336
11/6/2016 4:45:00 PM,374.999999996508,0.305
11/6/2016 4:46:00 PM,375.999999999767,0.336
11/6/2016 4:47:00 PM,377.000000003027,0.35
11/6/2016 4:49:00 PM,378.999999999069,0.334
11/6/2016 4:50:00 PM,380.000000002328,0.334
11/6/2016 4:52:00 PM,381.99999999837,0.322
11/6/2016 4:53:00 PM,383.00000000163,0.336
11/6/2016 4:55:00 PM,384.999999997672,0.328
11/6/2016 4:56:00 PM,386.000000000931,0.307
11/6/2016 4:58:00 PM,387.999999996973,0.351
11/6/2016 4:59:00 PM,389.000000000233,0.298
11/6/2016 5:00:00 PM,390.000000003492,0.335
11/6/2016 5:02:00 PM,391.999999999534,0.327
11/6/2016 5:03:00 PM,393.000000002794,0.307
11/6/2016 5:05:00 PM,394.999999998836,0.363
11/6/2016 5:06:00 PM,396.000000002095,0.319
11/6/2016 5:08:00 PM,397.999999998137,0.344
