Mass spectrometric analysis of selected radiolyzed amino acids in an astrochemical context

被引:8
|
作者
Cherubini, Cristina [1 ]
Ursini, Ornella [1 ]
Cataldo, Franco [2 ]
Iglesias-Groth, Susana [3 ]
Crestoni, Maria Elisa [4 ]
机构
[1] CNR, Ist Metodol Chim, Area Ric Montelibretti, I-00015 Monterotondo, RM, Italy
[2] Actinium Chem Res Srl, I-00133 Rome, RM, Italy
[3] Inst Astrofis Canarias, Tenerife, Canary Islands, Spain
[4] Univ Roma La Sapienza, Dipartimento Chim Tecnol Farmaco, I-00185 Rome, RM, Italy
关键词
Amino acids; Radiolysis; Mass spectrometry; Arginine; Proline; Tyrosine; MOLECULAR ASYMMETRY; IONIZING-RADIATION; COSMIC ABUNDANCES; ORGANIC-MATTER; HEAT BALANCES; METEORITES; ORIGIN; EARTH; MARS; RACEMIZATION;
D O I
10.1007/s10967-014-3078-1
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A selection of amino acids, namely arginine, proline and tyrosine previously irradiated to 3.2 mega-Gray in the solid state and analyzed by differential scanning calorimetry (DSC) and optical rotatory dispersion (ORD) were analyzed in the present work by mass spectrometry with the purpose to identify the radiolysis products and validate the results obtained previously with DSC and ORD. The radiolysis of amino acids is a top-down approach of a research program designed to assess the radiolysis resistance of these molecules for 4.6 x 10(9) years once buried in primitive bodies of the Solar System.
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页码:1061 / 1073
页数:13
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