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- Extraterrestrial amino acids in Orgueil and Ivuna: Tracing the parent body of CI type carbonaceous chondrites

Table 1.   Summary of the average serpentine blank-corrected amino acid concentrations in the 6 M HCl acid-hydrolyzed hot-water extracts of the CI-type carbonaceous chondrites Orgueil and Ivuna and the CM chondrites Murray and Murchison   Type CI CM Orgueil Ivuna Murray Murchison D-Asp 28  ± 16 30  ± 2 51  ± 31* 100  ± 15 L-Asp 54  ± 18 146  ± 8 65  ± 16 342  ± 103 D-Glu 15  ± 6 8  ± 1 135  ± 50 537  ± 117 L-Glu 61  ± 31 372  ± 11 261  ± 15 801  ± 200 Gly 707  ± 80 617  ± 83 2,110  ± 144 2,919  ± 433 D-Ala 69  ± 9 82  ± 22 617  ± 79 720  ± 95 L-Ala 69  ± 9 157  ± 14 647  ± 58 956  ± 171  -Ala 2,052  ± 311 1,401  ± 146 1,063  ± 268 1,269  ± 202 D,L--ABA 13  ± 11* 12  ± 7* 463  ± 68 914  ± 189 D,L--ABA 332  ± 99 438  ± 142 424  ± 18 708  ± 171  -ABA 628  ± 294  600 717  ± 192 1,331  ± 472 AIB 39  ± 37* 46  ± 33* 1,968  ± 350 2,901  ± 328 D,L--AIB 148  ± 70 84  ± 12 147  ± 88 343  ± 102 D,L-Iva * * 2,834  ± 780 3,359  ± 534 Total 4,200 4,000 11,500 17,200 All values are reported in ppb on a bulk-sample basis. The uncertainties are based on the standard deviation of the average value of between two and five separate measurements. * These concentrations were very similar to blank levels and therefore must be considered to be maximum values. Enantiomers could not be separated under the chromatographic conditions. Optically pure standard not available for enantiomeric identification.

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