---
instrument_id: '427'
data_file_original_name: 'LmHN_CIMS.csv'
skip_headers: '1'
charts: ''
headers:
    - 'Time'
    - '''C10H17I1N1O4'''
dataset_id: '4248'
experiment_link: 'https://icarus.ucdavis.edu/chambers/542/experiments/866'
experiment_set_link: 'https://icarus.ucdavis.edu/chambers/542/experimentSets/257'
chamber_link: 'https://icarus.ucdavis.edu/chambers/542'
dataset_created_at: '2023-01-24 22:19:52'
dataset_updated_at: '2023-01-24 22:19:52'
instrument_link: 'https://icarus.ucdavis.edu/chambers/542/instruments/427'
instrument:
    id: '427'
    short_name: 'FIGAERO-HR-ToF-CIMS (far, gas, time series)'
    full_name: 'Filter Inlet for Gases and AEROsols coupled to High Resolution Time-of-Flight Iodide Chemical Ionization Mass Spectrometer'
    manufacturer: 'Aerodyne Research Inc.'
    model: 'N/A'
    year: ''
    data_recording_software: 'TofDAQ recorder'
    data_analysis_software: 'Tofware'
    raw_data_time_resolution: '1 Hz'
    analysis_data_averaging: '1s'
    detection_limit: 'N/A'
    quantification_limit: ''
    sensitivity_to_temperature: 'Not known'
    sensitivity_to_relative_humidity: 'Sensitivity varies depending on water vapor pressure in IMR. We add excess water vapors directly to IMR so H2O·I- does not varies substantially.'
    sampling_method: 'Direct sampling for gas-phase measurement. Filter collection followed by thermal desorption for particle-phase measurement.'
    sample_preparation_method: 'N/A'
    sample_residence_time_in_seconds: ''
    length_of_tubing_in_cm: '450'
    flow_rate: '0.4-6.8 lpm'
    tubing_material: 'FEP teflon / stainless steel'
    chemical_identification_method: 'Mass spectrometry technique with selective ionization toward polar species (e.g., organic acids, polyols, multi-functional, nitrates, some inorganic species etc) by iodide ions. Though the resolving power (4000-5500 depending on tuning) is limited, mass assignment is done carefully based on knowledge on iodide selectivity and precursor VOC chemistry.'
    data_analysis_method: "Raw data (1 Hz) are averaged to 10-s data using Tofware 2.5.1x in Igor 6.\r\nTake a close look at diagnostic data (e.g., pressures, temperatures, flow readings) and remove data points if abnormal.\r\nInstrument functions\r\nBaseline is determined using either smooth or median average routine built in Tofware using an integration width of 15 to account for a large negative mass defect of iodide ion.\r\nPeak width as a function of m/z is determined using a built-in algorithm in Tofware using a tolerance of 5 to 10.\r\nPeak shape is determined using a built-in algorithm in Tofware and manually removing ions with bad shapes.\r\nTime-series mass calibration built in Tofware, in general, is done at 1-min interval, using I-, H2O·I-, CHOOH·I-, HNO3·I-, CF3COOH·I-, I2-, and I3- as mass calibrants. Exact choice changes depending on types of experiments. Peak search range of 10, fit type of custom shape, and 2-param fit equation are generally used though they vary depending on application.\r\nHigh resolution peak fitting routine is performed following Stark et al. (2015, IJMS) and based on known precursor VOC chemistry as well as knowledge on iodide selectivity.\r\nBatch HR calculation is done by using fully constrained fitting, applying ToF duty cycle at m/z 127 (I-), subtracting baseline before fitting, and constraining isotopes and reallocating signals. Calculated signals are then normalized by ([I-]+[H2O·I-]/106) and dilution factor if used."
    quantification_method: 'All signals are normalized by ([I-]+[H2O·I-]/106) to account for changes in abundance of reagent ions over time. When dilution flow is desired and employed (not to deplete reagent ions and not to have secondary ion chemistry), signals are further corrected accordingly. Signals from particle-phase measurements are converted to gas-phase measurement equivalent signals based on the collection volume, gas-phase sampling flow rate,'
    calibration_method: "We do 2 types of calibrations: sensitivity and volatility calibration.\r\nFor sensitivity calibration, we either flow a known concentration of analyte (e.g., permeation tube) to gas-phase inlet and measure signal at multiple levels of concentration, or we deposit a known mass of analyte on filter (FIGAERO), desorb it and measure signal at multiple levels of mass.\r\nFor volatility calibration, we deposit a mixture of species with known subcooled vapor pressures (e.g., organic acids, polyols) and relate them to the desorption temperature (Tmax) obtained by a Gaussian fit."
    calibration_drift_estimate: 'No estimate'
    calibration_schedule: 'As Needed'
    uncertainty_estimation_method: 'We use an error provided by Tofware.'
    known_interferences: 'Changes in water vapor pressure in IMR changes sensitivity greatly, especially at a lower end of vapor pressure.'
    link_to_supplemental_information: ''
    additional_notes: 'Time series normalized by the maximum signal of each species.'
    organization_id: '546'
    created_at: '2020-03-28T16:15:44.000000Z'
    updated_at: '2021-08-26T19:22:32.000000Z'
    column_descriptors: '[]'
    sampling_protocol: 'Online'
    skip_headers: '1'
    tubing_inner_diameter: '1/4 inch'
    what_is_measured: 'Gas/Particle composition'
    measurement_uncertainty: 'NA'
    measurement_units: 'hz'

---
Time,'C10H17I1N1O4'
-85,45718.38045
-84,45644.13496
-83,45796.05596
-82,45736.5158
-81,45606.23208
-80,45355.3435
-79,45498.03717
-78,45474.2933
-77,45421.54429
-76,45320.60437
-75,45357.14302
-74,45299.90991
-73,45197.1496
-72,45032.70646
-71,45030.32589
-70,41516.2047
-60,44656.76461
-59,44833.87963
-58,44758.83872
-57,44890.31318
-56,44885.73111
-55,44820.85039
-54,44839.64572
-53,44771.4317
-52,44912.86078
-51,44705.98263
-50,44810.1243
-49,44660.92059
-48,44673.19626
-47,44733.22153
-46,44800.66088
-45,44920.7359
-44,44669.6434
-43,44738.98318
-42,44613.82804
-41,44576.60575
-30,44421.28341
-29,44294.51126
-28,44174.29255
-27,44237.56574
-26,44133.4508
-25,44153.5342
-24,44195.25111
-23,44121.00996
-22,44113.2924
-21,44067.04689
-20,44049.82194
-19,44138.14617
-18,44090.90121
-17,44155.87487
-16,44041.25893
-15,43986.75631
-14,43949.81787
-13,44040.05303
-12,44033.3885
-11,43846.96677
0,43609.62584
1,43753.62265
2,43295.22818
3,43030.66573
4,43015.15636
5,43037.67012
6,43101.5658
7,42958.85728
8,43047.01255
9,42804.77052
10,42806.23358
11,42840.99682
12,42833.03969
13,42695.3947
14,42503.34948
15,42564.84505
16,42399.82399
17,42471.30004
18,42417.30126
19,41507.89874
31,41834.31286
32,41766.53089
33,41637.98788
34,41549.21927
35,41528.01785
36,41569.44629
37,41543.56168
38,41480.35788
39,41379.77976
40,41280.69586
41,41174.84046
42,41146.45325
43,41132.66167
44,40895.81758
45,40864.23885
46,40981.18678
47,40853.14658
48,40641.21183
49,40862.02515
50,40496.33294
61,40391.38828
62,40199.51758
63,40050.64506
64,40010.38519
65,40004.28215
66,40002.57276
67,39980.6291
68,39848.63928
69,39843.37238
70,39713.18696
71,39667.23265
72,39607.98454
73,39402.18711
74,39352.8762
75,39300.90575
76,39221.15184
77,39115.19949
78,39102.8911
79,39013.74953
80,37796.15121
91,38558.12011
92,38609.89791
93,38543.11524
94,38485.99893
95,38349.36312
96,38352.86336
97,38209.97106
98,38180.70123
99,38152.45301
100,38028.707
101,37941.57049
102,37945.3387
103,37969.63587
104,37916.51604
105,37903.37381
106,37896.5664
107,37704.66796
108,37639.37046
109,37638.47226
110,36771.97433
121,36815.38231
122,36787.49623
123,36747.35191
124,36739.34666
125,36533.94196
126,36660.91245
127,36481.39722
128,36508.62943
129,36490.75277
130,36443.09052
131,36407.39353
132,36575.39155
133,36475.65977
134,36338.84852
135,36517.06854
136,36230.37988
137,36238.80196
138,36089.36101
139,36173.80809
140,35268.98821
151,35568.54419
152,35446.4141
153,35326.6521
154,35289.87883
155,35253.97134
156,35193.9858
157,35077.03177
158,35033.25226
159,34972.60029
160,34909.83877
161,34869.375
162,34795.28836
163,34590.39255
164,34661.35346
165,34499.94242
166,34678.92537
167,34701.94716
168,34591.14376
169,34533.05338
170,31073.75439
181,33741.78761
182,33711.67176
183,33569.83538
184,33550.70436
185,33599.74292
186,33505.10571
187,33309.68423
188,33273.54757
189,33222.7198
190,33180.97405
191,33069.4362
192,33068.71857
193,32907.58006
194,32822.09398
195,32826.18383
196,32663.402
197,32805.25373
198,32578.52389
199,32590.6239
200,29023.94882
211,32147.34871
212,32104.35957
213,32052.23448
214,32007.53042
215,31961.16599
216,31903.79941
217,31877.56659
218,31831.91073
219,31793.27428
220,31726.48165
221,31696.07464
222,31589.5501
223,31496.15256
224,31377.90506
225,31446.37841
226,31337.68431
227,31217.32426
228,31215.39196
229,31084.2764
230,26939.72236
241,30805.40171
242,30833.88983
243,30716.12898
244,30597.67644
245,30520.14198
246,30357.73527
247,30283.78593
248,30291.71761
249,30122.93613
250,29954.05758
251,29963.41064
252,29959.60732
253,29896.18919
254,29826.60528
255,29795.95429
256,29759.15316
257,29705.47459
258,29659.07823
259,29603.74593
260,27492.26316
270,28979.70187
271,29086.73352
272,29028.09014
273,29053.61958
274,28945.84646
275,29009.49303
276,28882.10497
277,28951.6276
278,28870.67923
279,28774.07086
280,28807.55665
281,28839.19556
282,28811.5076
283,28806.08901
284,28647.99119
285,28617.28769
286,28730.15322
287,28636.60091
288,28737.10323
289,28255.09309
300,28449.75113
301,28273.84064
302,28339.69381
303,28310.46925
304,28274.44904
305,28329.47098
306,28157.138
307,28179.20845
308,28235.75781
309,28284.14561
310,28196.74209
311,28283.64177
312,28176.14899
313,28089.06539
314,28053.09479
315,28083.22033
316,28041.64068
317,27913.85227
318,27949.87726
319,27442.42532
330,27583.92536
331,27580.31113
332,27570.49199
333,27555.29062
334,27535.25999
335,27496.94394
336,27552.6746
337,27502.94234
338,27469.31509
339,27448.42532
340,27438.60688
341,27440.16121
342,27365.81554
343,27419.33878
344,27423.97694
345,27488.11756
346,27455.56048
347,27489.55082
348,27601.40775
349,27090.38554
360,27257.89605
361,27269.6258
362,27276.24212
363,27314.27363
364,27263.9373
365,27345.82802
366,27307.05023
367,27310.72954
368,27390.54471
369,27348.46788
370,27379.86996
