---
instrument_id: '418'
data_file_original_name: '130329_ams.csv'
skip_headers: '1'
charts: ''
headers:
    - 'exp_time(min)'
    - 'HRORG (ug/m3)'
    - 'HRSO4  (ug/m3)'
    - 'HRNH4 (ug/m3)'
    - 'O/C ratio'
    - 'H/C ratio'
    - 'N/C ratio'
dataset_id: '3414'
experiment_link: 'https://icarus.ucdavis.edu/chambers/553/experiments/600'
experiment_set_link: 'https://icarus.ucdavis.edu/chambers/553/experimentSets/215'
chamber_link: 'https://icarus.ucdavis.edu/chambers/553'
dataset_created_at: '2021-08-30 14:51:21'
dataset_updated_at: '2021-08-30 14:51:21'
instrument_link: 'https://icarus.ucdavis.edu/chambers/553/instruments/418'
instrument:
    id: '418'
    short_name: 'HR-ToF-AMS'
    full_name: 'High-resolution time-of-flight aerosol mass spectrometer'
    manufacturer: 'Aerodyne'
    model: '215-037'
    year: ''
    data_recording_software: 'ToF-AMS DAQ v4.0.40'
    data_analysis_software: 'SQUIRREL v1.61 and PIKA v1.21 modules for Igor Pro'
    raw_data_time_resolution: '100 Hz'
    analysis_data_averaging: '0.1 Hz'
    detection_limit: 'Detection limits for each class of chemical constituents are calculated as three times the standard deviation of blank signals measured from HEPA filter samples taken before each experiment.'
    quantification_limit: ''
    sensitivity_to_temperature: ''
    sensitivity_to_relative_humidity: ''
    sampling_method: 'Direct Sampling'
    sample_preparation_method: 'Submicrometer aerosol (35 nm-1.5 um) is sampled into the instrument through an aerodynamic lens at a flow rate of ~1.3 mL/s, producing a collimated particle beam that is directed onto a resistively heated surface where particles undergo vaporization (~600'
    sample_residence_time_in_seconds: ''
    length_of_tubing_in_cm: ''
    flow_rate: '1.3 mL/s'
    tubing_material: 'Stainless Steel'
    chemical_identification_method: 'Ions formed via electron impact ionization are detected with a custom-designed Tofwerk HR-ToF-MS configured in V-mode and operating at a mass resolution  of ~2100.'
    data_analysis_method: 'Data are analyzed using the SQUIRREL v1.61 and PIKA v1.21 modules for Igor Pro, and are corrected for gas-phase interferences and composition-dependent collection efficiencies.'
    quantification_method: 'he instrumental ionization efficiency is calibrated using dry, 350 nm ammonium nitrate particles. Mass loadings of sulfate, ammonium, chloride, and organic aerosol constituents are reported as "nitrate equivalent mass loadings (ug/m3)," assuming ionization efficiencies for these species relative to nitrate.'
    calibration_method: 'The instrumental ionization efficiency is calibrated using dry, 350 nm ammonium nitrate particles, generated via atomization of a dilute (0.01 M) aqueous solution of ammonium nitrate and size-selected with a DMA'
    calibration_drift_estimate: 'Low (on the order of weeks)'
    calibration_schedule: 'As Needed'
    uncertainty_estimation_method: 'N.A.'
    known_interferences: 'Mass spectral "air peaks," e.g., N2 interfering with aerosol-derived CO at m/z 28, are the most common interferences.'
    link_to_supplemental_information: ''
    additional_notes: 'The working principles, modes of operation, and analysis protocols for the HR-ToF-AMS have been extensively documented in the literature, so only brief descriptions are provided here.'
    organization_id: '540'
    created_at: '2020-03-13T22:57:47.000000Z'
    updated_at: '2020-03-24T20:18:20.000000Z'
    column_descriptors: "O:C is the oxygen to carbon atom ratio\r\nH:C is the hydrogen to carbon atom ratio\r\nN:C is the nitrogen to carbon atom ratio\r\nOM:OC is the organic mass to organic carbon ratio"
    sampling_protocol: 'Online'
    skip_headers: '1'
    tubing_inner_diameter: ''
    what_is_measured: 'Submicrometer, nonrefractory aerosol chemical composition; chemical speciation of sulfate, nitrate, ammonium, chloride, and organic aerosol constituents.'
    measurement_uncertainty: '(a) O:C (+/- 30%), (b) H:C (+/- 10%)'
    measurement_units: 'Unitless'

---
exp_time(min),HRORG (ug/m3),HRSO4  (ug/m3),HRNH4 (ug/m3),O/C ratio,H/C ratio,N/C ratio
0,3.7541487,10.39465921,0.043690581,0.23684137,1.780206,0.010690185
3,3.7224042,9.731665134,0.043405131,0.25849465,1.7568811,0.009932857
6,3.882549,12.95286955,0.044974513,0.27521357,1.7603543,0.01079148
9,3.8404765,11.94369174,0.045252047,0.27246359,1.8351729,0.010776126
12,3.9051263,13.09599726,0.046206966,0.27686262,1.7181772,0.007517187
15,3.9987082,15.0310122,0.046484441,0.30911458,1.7216049,0.009055299
18,3.8490739,12.01275763,0.045707565,0.27909961,1.7627636,0.010576241
21,3.919076,13.25223051,0.046714853,0.2768687,1.7882667,0.010372274
24,3.9305913,13.69084087,0.046059355,0.32742977,1.7291923,0.009930719
27,3.8307316,11.53702499,0.046002466,0.2894884,1.7861083,0.008951793
30,3.8359005,11.61421082,0.046141792,0.30055404,1.7482328,0.010038494
33,3.9349287,13.2826854,0.04780123,0.30147797,1.7730564,0.00839804
36,3.7598345,10.027586,0.045856949,0.29838642,1.7420611,0.009052633
39,3.8420663,11.54708745,0.046943985,0.28436372,1.7535745,0.009706232
42,3.5244522,5.173696425,0.043383334,0.32077834,1.6496338,0.010359949
45,3.6173465,7.336130456,0.043258023,0.36891532,1.6203357,0.010751906
48,3.2339871,-1.619882995,0.040751647,0.3170597,1.6438386,0.01225837
51,3.3355796,0.850317997,0.041842699,0.34092316,1.630492,0.013117813
54,3.6337488,7.528768458,0.0443298,0.3883349,1.5859652,0.011805185
57,3.4888403,4.321626346,0.043696582,0.33722454,1.6206685,0.011640914
60,3.513953,4.832079626,0.044277623,0.34811351,1.6085752,0.012315385
63,3.7648962,9.814438878,0.047368597,0.31415009,1.6240671,0.010699128
66,3.7478063,9.435279895,0.047460839,0.33835143,1.6073065,0.009444419
69,3.8908503,12.05952202,0.048994504,0.34386116,1.6130707,0.010609563
72,3.9699562,13.43781793,0.049856026,0.31713074,1.6256748,0.010103223
75,4.3030663,19.25483678,0.052094251,0.38132495,1.5905629,0.008819199
78,4.1033731,15.75743355,0.050983753,0.34368017,1.6054147,0.010652029
81,4.1420298,16.13036228,0.052201543,0.33621201,1.6219157,0.010876056
84,4.3907633,20.34329249,0.053617835,0.37688234,1.595518,0.009855726
87,4.1718445,16.60622314,0.052501071,0.32832214,1.6339079,0.010056929
90,4.2853589,18.33319863,0.053747244,0.33592385,1.6219325,0.00977159
93,4.3223524,18.9223137,0.054028932,0.35631499,1.6038183,0.009873297
96,4.5249877,21.7265552,0.056382049,0.33919829,1.6093447,0.011022535
99,4.8449731,26.01821313,0.059380446,0.36901951,1.5927057,0.009507054
102,4.9084635,26.41890347,0.060883053,0.33418673,1.6148608,0.007569079
105,5.4103136,32.34771712,0.065238409,0.35907888,1.6054628,0.007706123
108,5.4537811,32.00787545,0.067289099,0.33292982,1.6294006,0.008267968
111,5.4793081,32.21007834,0.067659199,0.31419402,1.6414557,0.008625385
114,5.8223815,35.28148401,0.071493067,0.32287255,1.6258959,0.00679791
117,6.0625467,36.92112333,0.074822932,0.32084215,1.6705674,0.008442144
120,6.2501516,38.56843875,0.076491341,0.32532388,1.6226734,0.008090922
123,6.3339782,39.33370813,0.077134304,0.3068448,1.6495222,0.008240338
126,6.255425,38.58858074,0.076588072,0.32347608,1.6262133,0.008115812
129,6.3520727,39.12470405,0.078008838,0.32159829,1.6249896,0.008911459
132,6.5988693,40.96299739,0.080532908,0.32119873,1.6223972,0.006920431
135,6.6699619,41.33539489,0.08152727,0.3146677,1.6337477,0.007464802
138,7.9657946,48.73571524,0.09573666,0.32724097,1.6365309,0.006589747
141,8.1819305,48.97703898,0.099677943,0.32221088,1.6377983,0.006812474
144,8.7098665,53.37624949,0.10135344,0.33179823,1.6177149,0.006514797
147,8.712307,52.09314596,0.10389672,0.31335342,1.6304808,0.007138852
150,8.9105415,52.60308577,0.10665803,0.32200512,1.6249002,0.006018933
153,9.7096014,55.64853326,0.11518006,0.30725619,1.6443009,0.00573595
156,9.4947014,55.09172971,0.1124434,0.30754635,1.6560043,0.006797099
159,9.6657257,56.61181475,0.11244518,0.33459941,1.6140275,0.005970486
162,10.176002,57.31352355,0.11997172,0.30898088,1.6407893,0.00539405
165,9.5507669,54.91584937,0.11382446,0.31634933,1.632889,0.006524847
168,9.9647999,55.93956616,0.11914286,0.31280929,1.6358635,0.004646308
171,10.77428,58.44406064,0.12788776,0.31150815,1.6346873,0.004429784
174,11.054829,59.27126607,0.13083623,0.30129257,1.6434876,0.004692774
177,10.925643,58.8026598,0.12968194,0.30803645,1.63939,0.00485907
180,11.777972,61.15211896,0.13863742,0.30167297,1.6667795,0.004978923
183,11.110773,58.9470992,0.13250479,0.30847862,1.6430094,0.004727474
186,11.703495,60.62282223,0.13861933,0.30521977,1.6403404,0.004476805
189,13.029454,67.27635045,0.14461923,0.31939647,1.6339313,0.004701048
192,12.149864,61.75657807,0.14330237,0.30776209,1.6523761,0.004600263
195,12.240797,62.11056362,0.1439497,0.31019861,1.6749669,0.005822245
198,12.449173,62.02962464,0.14749683,0.30695257,1.6433215,0.004749188
201,12.32388,62.0364264,0.14546099,0.30232096,1.6396046,0.004610311
204,13.373425,65.32982354,0.15419336,0.31800696,1.6317984,0.004328256
207,12.942651,62.59326608,0.15405253,0.2988027,1.6461341,0.003885869
210,13.756157,64.51136582,0.1620824,0.30618981,1.643851,0.004270073
213,14.033154,64.81392758,0.1655995,0.29864275,1.6505482,0.00393217
216,13.844271,64.09435317,0.1645117,0.30143908,1.6451308,0.004126221
219,13.880149,64.37662521,0.16434768,0.3007265,1.6438124,0.00391066
222,14.575631,65.39361272,0.1724271,0.29993683,1.6502323,0.004060058
225,14.946407,65.99862817,0.17646438,0.30408281,1.6506257,0.004088723
228,15.027882,65.96115789,0.17779982,0.30746076,1.6552664,0.004828672
231,15.4364,66.34976985,0.18291548,0.30325252,1.6485225,0.004406813
234,16.068838,68.72202431,0.18580416,0.31055623,1.6556137,0.005509316
237,15.944121,67.18939166,0.18818627,0.30217078,1.6614269,0.003990692
240,16.262121,67.5001449,0.19203101,0.30488288,1.6569077,0.003722787
243,16.601944,66.97251683,0.19861795,0.29972088,1.6520748,0.003823079
246,16.591963,67.46174332,0.19702964,0.30168569,1.6500211,0.003711174
249,16.87258,68.03029534,0.19950788,0.30432528,1.6501702,0.003959992
252,16.931036,67.93498573,0.20064825,0.2995773,1.657799,0.003831869
255,18.133606,69.30277103,0.21404059,0.29989046,1.6590811,0.003304532
258,18.330086,69.27337394,0.21696772,0.29871523,1.6592108,0.00377448
261,18.182741,69.25595115,0.21489476,0.30845949,1.6523242,0.005302555
264,18.55969,69.29031338,0.22022833,0.30054176,1.6619399,0.003497713
267,19.097586,69.65901683,0.22678451,0.30175829,1.653707,0.003382585
270,18.996441,69.25790711,0.22663753,0.29975483,1.6497474,0.003555874
273,19.554001,69.84537591,0.23271406,0.29742777,1.6548561,0.002706972
276,19.175081,69.9505418,0.22694722,0.29806715,1.6579355,0.003512373
279,20.81492,71.07166085,0.24644028,0.30298653,1.6520412,0.002900214
282,20.924438,69.28912788,0.2543608,0.2963421,1.6796283,0.00434432
285,21.032633,70.99954924,0.24975698,0.29940099,1.6642991,0.003381913
288,21.550138,72.88679903,0.25039017,0.30963981,1.6557341,0.003471047
291,21.745758,70.38706986,0.26206174,0.29702285,1.6857011,0.003941765
294,22.618757,74.11564127,0.26065695,0.30943266,1.6615665,0.003648161
297,22.444,72.5424786,0.26390055,0.30259821,1.662773,0.003887419
300,22.320221,71.44054888,0.26623845,0.29565758,1.6568085,0.002109504
303,22.489521,70.95685845,0.27043927,0.29952055,1.6661792,0.002594944
306,22.320713,71.20564419,0.26712367,0.30224705,1.6584005,0.003569137
309,23.469213,72.41755719,0.27851275,0.3000766,1.6635306,0.003322217
312,23.476597,72.93815898,0.27662608,0.2970199,1.6740397,0.003248479
315,24.363972,75.95064269,0.27733764,0.2975395,1.67101,0.002923978
318,23.695629,71.55107026,0.28504995,0.29772732,1.654152,0.002926606
321,23.977394,72.05320148,0.28697398,0.30085763,1.6565099,0.003231827
324,23.207859,71.02350888,0.28029957,0.29904258,1.6546502,0.003714689
327,24.523886,71.83104317,0.29546955,0.30106422,1.664783,0.003210937
