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Earth, Planets and Space
Fig. 6 | Earth, Planets and Space

Fig. 6

From: Environmental assessment in the prelaunch phase of Hayabusa2 for safety declaration of returned samples from the asteroid (162173) Ryugu: background monitoring and risk management during development of the sampler system

Fig. 6

Representative extracted ion chromatograms (EICs) of the aliphatic hydrocarbon compounds (n-alkanes; m/z = 57 on EIC) obtained from online thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) with a quantitative internal standard method (Takano et al. 2020) using an online thermal desorption (TD)-GC/MS using a multipurpose sampling and thermal desorption system (MSTD-258M; GL Science Inc.) and a purge and trap device (P&T; Gestel TDS A2, Gestel Inc.) coupled to a GC/MS system (Agilent 6890 N and 5973 MSD; Agilent Technologies Inc.). a Typical terrestrial reference (humic acid as standard reference; from FUJIFILM Wako Pure Chemical Corporation), b STA1 (code: 20141024-QF-01-#1), c SFA2 (code: 20141024-QF-06-#1). The two signals (*) between 13 and 14 min appear to be compounds that possess the characteristic –C4H9 fragment. d Mass spectra of the gas chromatographic retention time (13.13 min; scan 2252) and the candidate of 2-ethylhexyl acrylate by the NIST database library were shown

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