Mass

MS-IW-7729          
2-pyrazinecarboxamide 4-oxide
C5H5N3O2            (Mass of molecular ion:    139)

   Source Temperature: 180 °C
   Sample Temperature: 180 °C
   Direct, 75 eV

      18.0       2.9
      26.0       4.2
      27.0       2.2
      28.0       6.5
      30.0       4.4
      38.0       2.5
      39.0       6.2
      40.0       4.7
      41.0       6.7
      42.0       4.6
      43.0       1.5
      44.0      11.9
      51.0       6.7
      52.0      20.7
      53.0       6.6
      64.0       1.3
      66.0       5.8
      67.0       2.0
      68.0       1.3
      77.0       1.3
      78.0       7.4
      79.0       3.6
      80.0       6.1
      95.0       7.1
      96.0      58.6
      97.0       3.1
     105.0      10.3
     121.0      24.5
     122.0       2.0
     123.0       5.4
     139.0     100.0
     140.0       8.4