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Long-term thermal stability of fluorescent dye used for chiral amino acid analysis on future spaceflight missions.
Creamer, Jessica S; Mora, Maria F; Noell, Aaron C; Willis, Peter A.
Afiliação
  • Creamer JS; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California.
  • Mora MF; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California.
  • Noell AC; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California.
  • Willis PA; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California.
Electrophoresis ; 40(23-24): 3117-3122, 2019 12.
Article em En | MEDLINE | ID: mdl-31599461
ABSTRACT
Future spaceflight missions focused on life detection will carry with them new, state-of-the-art instrumentation capable of highly selective and sensitive organic analysis. CE-LIF is an ideal candidate for such a mission due to its high separation efficiency and low LODs. One perceived risk of utilizing this technique on a future mission is the stability of the chemical reagents in the spaceflight environment. Here, we present an investigation of the thermal stability of the fluorescent dye (5-carboxyfluorescein succinimidyl ester) used for amino acid analysis. The dye was stored at 4, 25, and 60°C for 1 month, 6 months, 1 year, and 2 years. When stored at 4°C for 2 years, 25°C for 6 months, or 60°C for 1 month there was no effect on CE-LIF assay performance due to dye degradation. Beyond these time points, while the dye degradation begins to interfere with the analysis, it is still possible to perform the analysis and achieve the majority of amino acid biosignature science goals described in the science definition team report for the potential Europa Lander mission. This work indicates that thermal control of the dye at ≤4°C will be needed during transit on future spaceflight missions to maintain dye stability.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Exobiologia / Eletroforese Capilar / Corantes Fluorescentes / Aminoácidos Idioma: En Ano de publicação: 2019 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Exobiologia / Eletroforese Capilar / Corantes Fluorescentes / Aminoácidos Idioma: En Ano de publicação: 2019 Tipo de documento: Article