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

Fig. 6

From: A curation for uncontaminated Hayabusa2-returned samples in the extraterrestrial curation center of JAXA: from the beginning to present day

Fig. 6Fig. 6Fig. 6Fig. 6

Concentrations of a organics (ng/cm2), b negative and positive ions (ng/m3) and c metallic elements (atoms/cm2) detected in the clean rooms and/or the CCs (CC2, CC3-3, CC4-1 and CC4-2). a, c Analysis of contaminants deposited on surfaces of Si wafers exposed to the environments for 15–20 h using GC–MS and ICP-MS, respectively. b Contaminants in cleanrooms assessed using the impinger method and analyzed using ICP-MS

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