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Earth, Planets and Space

Table 1 Quantification results of the witness coupons in the clean chamber of the ISAS/JAXA curation room

From: Amino acids on witness coupons collected from the ISAS/JAXA curation facility for the assessment and quality control of the Hayabusa2 sampling procedure

pmol/cm2

Blank

Day 1

Day 2

Day 7

Day 31

Alanine

0.26

0.68

2.3

2.1

0.66

Glycine

0.88

2.1

3.2

10

1.5

Valine

< LOQa

< LOQ

< LOQ

< LOQ

< LOQ

Leucine

< LOQ

0.67

0.88

< LOQ

0.25

Isoleucine

< LOQ

1.0

0.61

0.42

0.55

Proline

< LOQ

< LOQ

0.38

< LOQ

< LOQ

Aspartic acid

0.49

0.25

0.60

2.2

0.26

Glutamic acid

0.33

0.28

1.1

1.0

0.43

  1. a< LOQ: under the limit of quantification by GC/NPD analysis, although identified by GC/MS analysis
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