Document Detail


Evaluation of portable Raman instrumentation for identification of β-carotene and mellitic acid in two-component mixtures with halite.
MedLine Citation:
PMID:  21296611     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Recently, portable Raman instrumentation has been in demand for geosciences and for future planetary exploration for the identification of both organic and inorganic compounds in situ on Earth and on other planetary bodies, especially on Mars. Here we present the results of the analysis of halite/β-carotene and halite/mellitic acid mixtures, performed by miniaturized Raman instrumentation equipped with 785 and 1064nm excitation. Various proportions of organics in the halite matrix were examined. The lowest concentration of β-carotene detected using the 785nm laser was 1mgkg(-1), with slightly better signals observed with shorter exposure times compared with the bench instrument using the same excitation wavelength. Mellitic acid was identified at the concentration level 10gkg(-1). The 1064nm excitation provided a lower sensitivity towards low concentration when compared with the 785nm excitation.
Authors:
P Vítek; H G M Edwards; J Jehlička; R Cox
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-12
Journal Detail:
Title:  Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy     Volume:  -     ISSN:  1873-3557     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-2-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9602533     Medline TA:  Spectrochim Acta A Mol Biomol Spectrosc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Affiliation:
Institute of Geochemistry, Mineralogy and Mineral Resources, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic.
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