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Table 3 Calibration condition, intensities of m/z 28 and 40, and sensitivity of 40Ar

From: The GAs Extraction and Analyses system (GAEA) for immediate extraction and measurements of volatiles in the Hayabusa2 sample container

Calib. No Date Volume of meas.a Pressure in QMSb (Pa) Amount of 40Ar in QMS (cm3STP) I40 (A) I28/I40 Sensitivity of 40Arc (cm3STP/A)
8 7/8/20 PQ- 1.5E−05 4.37E−10 1.02E−12 120 428
9 7/14/20 PQ- 1.5E−05 4.33E−10 1.03E−12 136 421
10 (a) 7/21/20 PQ- 1.5E−05 4.29E−10 6.90E−13 95 621
10 (b)   V2- 3.1E−05 1.00E−09 1.99E−12 111 458
10 (c)   Vga- 6.6E−05 2.65E−09 4.05E−12 106 507
11 (a) 8/18/20 PQ- 1.5E−05 4.25E−10 6.23E−13 82 682
11 (b)   V2- 3.1E−05 9.96E−10 1.72E−12 89 524
11 (c)   V1- 2.5E−05 8.74E−10 1.30E−12 98 559
11 (d)   Vga- 4.4E−05 1.75E−09 2.47E−12 108 512
12 9/16/20 PQ- 1.5E−05 4.21E−10 8.77E−13 140 480
13 (a)   PQ- 6.0E−06 1.73E−10 2.50E−13 69 681
13 (b)   Vga- 3.9E−06 1.55E−10 3.19E−13 239 345
     Average of all data: 116 518
        ± 44  ± 104
     Average of data on 7/21 and 8/18: 98 540
        ± 11  ± 77
  1. Terrestrial atmosphere was used as calibration gas. Volume fraction of 40Ar is 0.0093
  2. aVolumes to which calibration gases were introduced for the QMS measurements
  3. PQ-: [V-PQ + V-QMSW], V2-: [V-2 + V-PQ + V-QMSW], V1-: [V-1 + V-2 + V-PQ + V-QMSW], Vga-: [V-Gauge + V-1 + V-2 + V-PQ + V-QMSW]
  4. bPressures in the QMS during analyses are calculated based on the gas amounts and the volumes shown in Table 1
  5. cSensitivities are calculated using the average of three measured data around 50–90 s after inlet of gases into the QMS
  6. All sensitivities are corrected as the analytical volume conditions to be [V-PQ + V-QMSW]