Mass

MS-IW-9943          
(1R-trans)-1,2-cyclobutanedicarboxylic acid
C6H8O4              (Mass of molecular ion:    144)

   Source Temperature: 170 °C
   Sample Temperature: 140 °C
   Direct, 75 eV

      18.0       3.9
      26.0       8.6
      27.0      35.9
      28.0      21.5
      29.0      16.3
      31.0       1.8
      38.0       1.4
      39.0      13.4
      40.0       1.4
      41.0       9.3
      42.0       8.2
      43.0      28.1
      44.0       5.6
      45.0      27.2
      46.0       1.6
      50.0       2.9
      51.0       4.5
      52.0       2.9
      53.0      27.2
      54.0      17.1
      55.0      62.5
      56.0       8.4
      57.0      13.6
      58.0       4.1
      60.0       1.2
      68.0       1.1
      69.0      10.8
      70.0      10.0
      71.0      13.8
      72.0      14.0
      73.0      44.7
      74.0       1.7
      80.0       6.8
      81.0      25.9
      82.0      10.6
      83.0       1.4
      84.0       1.3
      85.0       1.3
      86.0       1.0
      88.0       1.0
      97.0       8.6
      98.0     100.0
      99.0      39.6
     100.0       8.1
     108.0      16.5
     109.0       1.1
     117.0      14.9
     126.0      86.7
     127.0      10.0
     128.0       1.1