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Table 1

Characteristics of the calibration samples analyzed with the COSIMA RM.

# Name Target Classification H ∕C (at.) Reference H+ /C+ H−/ Analysis date (+) Analysis date (−)
1 Kerogen 556 type III 0.75 ± 0.03 Piani (2012) 4.98 ± 0.02 52.0 ± 0.1 2017-06-14 2017-06-11
2 IOM Orgueil 556 CI1 0.673 ± 0.014 Alexander et al. (2007) 4.89 ± 0.07 42.2 ± 9.9 2017-06-13 2017-06-10
3 IOM EET 92042 574 CR2 0.757 ± 0.02 Alexander et al. (2007) 5.49 ± 0.04 23.4 ± 0.5 2018-02-12 2017-11-09
4 IOM GRO 95566 574 CM2 0.665 ± 0.005 Alexander et al. (2010) 5.05 ± 0.09 23.6 ± 1.0 2018-02-12 2017-11-09
5 IOM GRO 95577 574 CR1 0.786 ± 0.031 Alexander et al. (2007) 4.40 ± 0.07 18.5 ± 2.4 2018-02-12 2018-02-13
6 IOM PCA 91008 574 CMheated 0.242 Alexander et al. (2010) 2.84 ± 0.09 15.4 ± 2.4 2018-02-12 2017-11-09
7 IOM Tagish Lake 1 575 C2, ungrouped 0.337 ± 0.01 Alexander et al. (2007) 3.10 ± 0.07 15.6 ± 1.1 2018-02-11 2018-02-11
8 IOM Tagish Lake 3 575 C2, ungrouped 0.509 ± 0.025 Alexander et al. (2014) 4.07 ± 0.08 21.8 ± 1.2 2018-02-11 2018-02-12
9 IOM Tagish Lake 4 575 C2, ungrouped 0.594 Alexander et al. (2014) 4.14 ± 0.09 36.0 ± 5.7 2018-02-11 2018-02-12
10 IOM Tagish Lake 5 575 C2, ungrouped 0.722 ± 0.063 Alexander et al. (2014) 5.00 ± 0.09 30.6 ± 2.9 2018-02-11 2018-02-12
11 Coronene 56E PAH (C24H12) 0.5 – 4.28 ± 0.01 39.2 ± 7.8 2018-03-09 2018-03-09
12 Diamond 56E − 0 – 2.37 ± 0.02 16.8 ± 4.0 2018-03-09 2018-03-09
13 Graphite 56E − 0 – 2.77 ± 0.02 12.1 ± 0.3 2018-03-09 2018-03-09
14 Hexatriacontane 56E alkane (C36H74) 2.055 – 11.78 ± 0.06 181 ± 17 2018-03-09 2018-03-09

Notes. Columns are: target numbers, the H ∕C atomic ratio from the literature, the measured H+ /C+ and H− / ion ratios and the analysis dates for both secondary ion registration modes.

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