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Table 5 Basic principal component statistics in the static samples (i.e., CPS1–12 and CAS1–12; n = 10)

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

Concentration (ng/sample)

Average (n = 10)

Standard deviation (1σ)

Total organics

617.4

492.0

Major elements

 Na

266.8

219.2

 Ca

155.4

179.5

 K

102.7

134.4

 Zn

30.5

29.0

 Al

19.1

31.7

 Mg

11.8

11.2

 P

5.2

5.4

 Cu

1.6

1.1

 Ti

1.1

1.4

 Fe

0.7

0.8

 Ni

0.5

0.4

 Mn

0.5

0.4

Major ions

 Cl−

238.1

338.9

 NO3−

165.5

248.9

 SO42−

43.0

50.6

 NO2−

5.3

2.3

 F−

4.7

5.9