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首页> 美国政府科技报告 >Search for Ammonia in Martian Soils with Curiosity's SAM Instrument.
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Search for Ammonia in Martian Soils with Curiosity's SAM Instrument.

机译：用好奇号的sam仪器搜索火星土壤中的氨。

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Nitrogen is the second or third most abundant constituent of the Martian atmosphere (1,2). It is a bioessential element, a component of all amino acids and nucleic acids that make up proteins, DNA and RNA, so assessing its availability is a key part of Curiosity's mission to characterize Martian habitability. In oxidizing desert environments it is found in nitrate salts that co-occur with perchlorates (e.g., 3), inferred to be widespread in Mars soils (4-6). A Mars nitrogen cycle has been proposed (7), yet prior missions have not constrained the state of surface N. Here we explore Curiosity's ability to detect N compounds using data from the rover's first solid sample. Companion abstracts describe evidence for nitrates (8) and for nitriles (C(triple bond)N) (9); we focus here on nonnitrile, reduced-N compounds as inferred from bonded N-H. The simplest such compound is ammonia (NH3), found in many carbonaceous chondrite meteorites in NH4(+) salts and organic compounds (e.g., 10).

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