Mass

MS2003-01570WA      
5-hydroxy-2,7-dimethoxy-1,4-naphthoquinone
C12H10O5            (Mass of molecular ion:    234)

   Source Temperature: 250 °C
   Sample Temperature:  45 °C
   Direct, 70 eV
   comment:  there is impurity peak at m/z 248.

      15.0       1.3
      18.0       1.6
      28.0       1.4
      39.0       1.1
      50.0       2.6
      51.0       4.2
      53.0       2.9
      59.0       1.1
      62.0       3.3
      63.0       4.3
      64.0       2.4
      65.0       1.6
      66.0       1.2
      69.0      12.3
      74.0       1.8
      75.0       2.4
      76.0       2.9
      77.0       3.2
      78.0       1.3
      79.0       2.9
      87.0       1.1
      89.0       1.7
      90.0       1.7
      91.0       2.2
      92.0       5.2
      93.0       1.5
     103.0       2.9
     104.0       1.2
     105.0       2.4
     106.0       1.8
     107.0       1.7
     118.0       3.1
     119.0       3.4
     120.0       2.4
     121.0       1.3
     122.0       5.1
     124.0       1.1
     132.0       2.0
     133.0       5.0
     134.0       2.5
     135.0      28.2
     136.0       2.7
     146.0       1.9
     147.0       2.8
     148.0       5.6
     149.0       3.2
     150.0       5.5
     151.0       5.0
     160.0       1.5
     161.0       2.2
     162.0       1.1
     163.0      19.7
     164.0       2.4
     173.0       1.4
     174.0       1.9
     175.0       4.3
     176.0       4.9
     177.0       8.4
     178.0       3.3
     179.0       1.6
     188.0       1.3
     189.0       1.4
     191.0       5.6
     192.0       1.2
     202.0       1.6
     203.0      12.7
     204.0      32.6
     205.0      18.3
     206.0       7.2
     217.0       1.1
     219.0      10.2
     220.0       1.8
     232.0       2.1
     233.0       2.0
     234.0     100.0
     235.0      12.9
     236.0       1.8
     247.0       1.0
     248.0       7.0
     249.0       1.0