Electrochemical sensors, especially ion-selective electrodes, are ideally suited for analyses of extraterrestrial environments where comparatively little is known about the chemistry: they have remarkably high sensitivity over a wide dynamic range and are available for a wide range of organic and inorganic cations and anions. In addition, ion-selective electrodes require very little power, have low mass, and can withstand dramatic swings in temperature and pressure without loss of function. Analysis in exosphere environments offers unique challenges caused by the preflight preparations and storage of the sensors, the long cruise to the planetary body, and the harsh environmental conditions in which the analyses must be performed. Currently, only a single set of electrochemical analyses of another planet has been performed, but several new instruments are being developed which will potentially provide insight into the scientific questions surrounding the chemistry and biology of other planetary bodies in our solar system.
This chapter discusses the challenges of performing electrochemical analyses in an extraterrestrial environment such as Mars, with an emphasis on sensor development, characterization, and calibration while addressing lessons learned from the Phoenix mission, and looking to the future of electrochemical analyses of other planetary bodies.
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Clark BC, Mason L, Thompson P (1995) Mars aqueous chemistry experiment (MACE), NASA technical report CR-201925. Lockheed Martin Astronautics, Denver, COGoogle Scholar
Kounaves SP et al (2003) Mars Surveyor Program’01 Mars Environmental Compatibility Assessment wet chemistry lab: a sensor array for chemical analysis of the Martian soil. J Geophys Res 108:5077. doi:10.1029/2002JE001978CrossRefGoogle Scholar
Smith PH et al (2008) Introduction to special section on the phoenix mission: landing site characterization experiments, mission overviews, and expected science. J Geophys Res 113:E00A18. doi:10.1029/2008JE003083Google Scholar
Smith PH et al (2009) H2O at the phoenix landing site. Science 325:58–61Google Scholar
Kounaves SP, Hecht MH, West SJ et al (2009) The MECA wet chemistry laboratory on the 2007 Phoenix Mars scout lander. J Geophys Res 114:E00A19. doi:10.1029/2008JE003084Google Scholar
Bakker E, Bühlmann P, Pretsch E (1997) Carrier-based ion selective electrodes and bulk optodes. 1. General characteristics. Chem Rev 97:3083–3132CrossRefGoogle Scholar
Cosofret VV, Erdosy M, Johnson TA et al (1995) Microfabricated sensor arrays sensitive to pH and K+ for ionic distribution measurements in the beating heart. Anal Chem 67:1647–1653. doi:10.1021/ac00106a001CrossRefGoogle Scholar
Bard AJ, Faulkner LR (2001) Electrochemical methods: fundamentals and applications, 2nd edn. Wiley, New York, NYGoogle Scholar
Kounaves SP, Hecht MH, Kapit J et al (2010) Wet chemistry experiments on the 2007 phoenix Mars scout lander mission: data analysis and results. J Geophys Res 115:E00E10. doi:10.1029/2009JE003424Google Scholar
Hecht MH, Kounaves SP, Quinn RC et al (2009) Detection of perchlorate and the soluble chemistry of martian soil at the phoenix lander site. Science 325:64–67Google Scholar
Kounaves SP, Stroble ST, Anderson RM et al (2010) Discovery of natural perchlorate in the Antarctic Dry Valleys and its global implications. Environ Sci Technol 44:2360–2364. doi:10.1021/es9033606CrossRefGoogle Scholar
Catling DC, Claire MW, Zahnle KJ et al (2010) Atmospheric origins of perchlorate on Mars and in the Atacama. J Geophys Res 115:E00E11. doi:10.1029/2009JE003425Google Scholar
Kounaves SP, Chaniotakis NA, Chevrier VF et al (2013) Identification of the perchlorate parent salts at the Phoenix Mars landing site and possible implications. Icarus 232:226–231CrossRefGoogle Scholar
Boynton WV, Ming DW, Kounaves SP et al (2009) Evidence for calcium carbonate at the Mars Phoenix landing site. Science 325:61–64Google Scholar
Bühlmann P, Amemiya S, Yajima S, Umezawa Y (1998) Co-Ion interference for ion selective electrodes based on charged and neutral ionophores: a comparison. Anal Chem 70:4291–4303CrossRefGoogle Scholar
Kounaves SP, Hecht MH, Kapit J et al (2010) Soluble sulfate in the martian soil at the Phoenix landing site. Geophys Res Lett 37. doi: 10.1029/2010GL042613
Quinn RC, Chittenden JD, Kounaves SP, Hecht MH (2011) The oxidation-reduction potential of aqueous soil solutions at the Mars Phoenix landing site. Geophys Res Lett 38:L14202. doi:10.1029/2011GL047671CrossRefGoogle Scholar