Record details

    Beta-carotene-A possible biomarker in the Martian evaporitic environment: Raman micro-spectroscopic study
    Jehlička, Jan
    Osterrothová, Kateřina
    Vítek, Petr
Publication type
    článek v periodiku
Source title - serial
    Planetary and Space Science
    Roč. 57, č. 4
Thesaurus term
    Martian evaporitic environmen
    Raman micro-spectroscopy
Abstract (in english)
   Raman micro-spectroscopy was tested as a nondestructive method of determining the presence of beta-carotene in experimentally prepared evaporitic matrices. Samples prepared by mixing beta-carotene with powdered gypsum, halite and epsomite were analyzed using a 785 nm excitation source. Various concentrations of beta-carotene in the matrices were investigated to determine the lowest beta-carotene content detectable by Raman microspectroscopy. We were able to obtain a clear beta-carotene signal at the 10 mg kg(-1) concentration level-the number of registered beta-carotene Raman bands differed depending on the particular mineral matrix. Spectral signatures of beta-carotene were detected even when analyzing samples containing 1 mg kg(-1) of this molecule. The 10-100 mg kg(-1) of beta-carotene in mineral matrices (halite, epsomite) was detected when analyzed through the monocrystal of gypsum and epsomite, respectively. These results will aid both in-situ analyses on Mars and sample analyses
    on Earth.
    UK Praha, Přírodovědecká fakulta
Contributor code
    UK, PřF
Source format
Import date
    8. 8. 2012