Mass

MS-IW-0932          
dimethyl 3-methyl-2-pentenedioate
C8H12O4             (Mass of molecular ion:    172)

   Source Temperature: 230 °C
   Sample Temperature: 150 °C
   Reservoir, 75 eV

      15.0      20.3
      27.0       8.4
      28.0       4.5
      29.0       4.2
      31.0       1.6
      38.0       1.5
      39.0      14.0
      40.0       1.5
      41.0      10.2
      42.0       3.7
      43.0       5.9
      45.0       6.5
      50.0       1.3
      51.0       2.5
      52.0       3.9
      53.0      23.6
      54.0       7.4
      55.0      22.4
      56.0       1.3
      57.0       1.4
      59.0      25.5
      67.0       3.8
      68.0       1.3
      69.0       5.7
      71.0       3.8
      80.0       1.6
      81.0      23.8
      82.0      13.6
      83.0       5.3
      85.0       6.0
      89.0       1.4
      97.0      30.6
      98.0       2.9
      99.0       3.5
     108.0      12.5
     109.0      27.0
     110.0       1.9
     111.0       2.3
     112.0      87.8
     113.0      34.0
     114.0       2.7
     131.0       1.4
     140.0     100.0
     141.0      46.2
     142.0       4.2