Analysis of inorganic cations and amino acids in high salinity samples by capillary electrophoresis and conductivity detection: Implications for in‐situ exploration of ocean worlds
| Autor: | Mauro Sergio Ferreira Santos, Aaron C. Noell, Carlos D. Garcia, Maria F. Mora, Thiago Gomes Cordeiro |
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| Rok vydání: | 2018 |
| Předmět: |
In situ
Salinity Extraterrestrial Environment Oceans and Seas Clinical Biochemistry Context (language use) 02 engineering and technology Sodium Chloride Conductivity 01 natural sciences Biochemistry Analytical Chemistry chemistry.chemical_compound Capillary electrophoresis Cations Exobiology Seawater Amino Acids Derivatization Enceladus 010401 analytical chemistry Electric Conductivity Electrophoresis Capillary Space Flight 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Inorganic Chemicals Environmental chemistry Environmental science 0210 nano-technology Earth (classical element) |
| Zdroj: | ELECTROPHORESIS. 39:2890-2897 |
| ISSN: | 1522-2683 0173-0835 |
| Popis: | With growing interest in exploring ocean worlds, such as Europa and Enceladus, there is a fundamental need to develop liquid-based analytical techniques capable of handling high salinity samples while performing both bulk and trace species measurements. In this context, CE with capacitively coupled contactless conductivity detection (CE-C4 D) has tremendous potential. One of its advantages is that this combination allows the detection of a wide number of charged species (both organic and inorganic) without the need of derivatization. Amino acids are an example of organic targets that are powerful biosignatures in the search for life beyond Earth. Simultaneous information on the inorganic cations in a sample helps with assessing the habitability of an extraterrestrial environment, as well as providing sample context for any measurements of trace amino acids. In this work, we present a series of flight-compatible methods capable of simultaneously measuring inorganic cations and amino acids in samples of varying salinity by CE-C4 D. Regardless of the sample total salinity, 5.0 M acetic acid was selected as the optimum BGE. The methods were evaluated by analyzing natural samples of low and high salinity from Hot Creek Gorge, Mono Lake, and Santa Monica beach. Prospects for mission implementation are also discussed. |
| Databáze: | OpenAIRE |
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