Skip to main content

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