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| Titel |
Possible detection of perchlorates by the Sample Analysis at Mars (SAM) Instrument: Comparison with previous missions |
| VerfasserIn |
Rafael Navarro-Gonzalez, Brad Sutter, Doug Archer, Doug Ming, Jennifer Eigenbrode, Heather Franz, Daniel Glavin, Amy McAdam, Jennifer Stern, Christopher McKay, Patrice Coll, Michel Cabane, Pamela Conrad, Paul Mahaffy, Francisco Martín-Torres, Maria Zorzano-Mier, John Grotzinger, MSL Science Team |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250077746
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| Zusammenfassung |
| The first chemical analysis of soluble salts in the soil was carried out by the Phoenix Lander
in the Martian Arctic [1]. Surprisingly, chlorine was present as magnesium or calcium
perchlorate at 0.4 to 0.6 percent. Additional support for the identification of perchlorate came
from the evolved gas analysis which detected the release of molecular oxygen at 350-550C
[1]. When Mars-like soils from the Atacama Desert were spiked with magnesium
perchlorate (1 precent) and heated using the Viking GC-MS protocol, nearly all the
organics were combusted but a small amount was chlorinated, forming chloromethane
and dichloromethane [2]. These chlorohydrocarbons were detected by the Viking
GC-MS experiments when the Martian soil was analyzed but they were considered
to be terrestrial contaminants [3]. Reinterpretation of the Viking results suggests |
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