D(+)-Ribonic acid gamma-lactone

Mass

MS-NW-6900          
D-(+)-ribono-1,4-lactone
C5H8O5              (Mass of molecular ion:    148)

   Source Temperature: 250 °C
   Sample Temperature: 130 °C
   Direct, 75 eV

      14.0       3.3
      15.0      17.2
      17.0       1.1
      18.0       4.7
      19.0      20.6
      26.0       3.9
      27.0      15.7
      28.0       8.3
      29.0      37.3
      30.0      13.2
      31.0      40.4
      32.0       2.5
      38.0       1.0
      39.0       5.9
      40.0       6.8
      41.0       3.8
      42.0      25.9
      43.0      54.9
      44.0      15.2
      45.0      15.3
      47.0       4.0
      53.0       1.1
      54.0       2.4
      55.0      26.9
      56.0      13.1
      57.0      49.2
      58.0      37.4
      59.0       3.5
      60.0      62.6
      61.0      61.2
      62.0       2.2
      68.0       6.3
      69.0       1.9
      71.0      12.8
      72.0       6.8
      73.0     100.0
      74.0       7.9
      76.0      11.3
      84.0       1.5
      85.0       2.5
      86.0      11.0
      87.0       1.5
      88.0       1.5
      89.0       8.4
      91.0      13.0
     100.0       1.1
     102.0       1.3
     130.0       1.2

Assign. Shift(ppm) A 4.76 B 4.589 C 4.449 D *1 3.882 E *1 3.820 SOLVENT SIGNAL REMOVED

     Hz     ppm     Int.

   1903.20   4.763   1000
   1897.58   4.749    750
   1838.01   4.600    290
   1834.35   4.590    495
   1830.69   4.581    308
   1781.13   4.457    589
   1780.64   4.456    635
   1775.51   4.443    536
   1775.02   4.442    587
   1562.50   3.910    241
   1559.20   3.902    263
   1549.44   3.877    598
   1546.14   3.869    569
   1532.96   3.836    571
   1528.81   3.826    569
   1524.66   3.815     30
   1519.90   3.804    257
   1515.75   3.793    244