|
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
|
- Terrestrial atmosphere was used as calibration gas. Volume fraction of 40Ar is 0.0093
- aVolumes to which calibration gases were introduced for the QMS measurements
- 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]
- bPressures in the QMS during analyses are calculated based on the gas amounts and the volumes shown in Table 1
- cSensitivities are calculated using the average of three measured data around 50–90 s after inlet of gases into the QMS
- All sensitivities are corrected as the analytical volume conditions to be [V-PQ + V-QMSW]
