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The Mars Environmental Compatibility Assessment (MECA) Wet Chemistry Experiment on the Mars 2001 LanderThe Mars Environmental Compatibility Assessment (MECA) is an instrument suite that will fly on the Mars Surveyor 2001 Lander Spacecraft. MECA is sponsored by the Human Exploration and Development of Space (HEDS) program and will evaluate potential hazards that the dust and soil of Mars might present to astronauts and their equipment on a future human mission to Mars. Four elements constitute the integrated MECA payload: a microscopy station, patch plates, an electrometer, and the wet chemistry laboratory (WCL). The WCL consists of four identical cells, each of which will evaluate a sample of Martian soil in water to determine conductivity, pH, redox potential, dissolved C02 and 02 levels, and concentrations of many soluble ions including sodium, potassium, magnesium, calcium and the halides. In addition, cyclic voltammetry will be used to evaluate reversible and irreversible oxidants present in the water/soil solution. Anodic stripping voltammetry will be used to measure concentrations of trace metals including lead, copper, and cadmium at ppb levels. Voltammetry is a general electrochemical technique that involves controlling the potential of an electrode while simultaneously measuring the current flowing at that electrode. The WCL experiments will provide information on the corrosivity and reactivity of the Martian soil, as well as on soluble components of the soil which might be toxic to human explorers. They will also guide HEDS scientists in the development of high fidelity Martian soil simulants. In the process of acquiring information relevant to HEDS, the WCL will assess the chemical composition and properties of the salts present in the Martian soil.
Document ID
20000012709
Document Type
Conference Paper
Authors
Grannan, S. M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Frant, M. (Orion Research, Inc. Beverly, MA United States)
Hecht, M. H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Kounaves, S. P. (Tufts Univ. Medford, MA United States)
Manatt, K. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Meloy, T. P. (West Virginia Univ. Morgantown, WV United States)
Pike, W. T. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Schubert, W. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
West, S. (Orion Research, Inc. Beverly, MA United States)
Wen, X. (Orion Research, Inc. Beverly, MA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Workshop on Mars 2001: Integrated Science in Preparation for Sample Return and Human Exploration
Subject Category
Lunar and Planetary Science and Exploration
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle20000012695Analytic PrimaryWorkshop on Mars 2001: Integrated Science in Preparation for Sample Return and Human Exploration
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