Caffeic acid

Mass

MS-NW-0350          
3,4-dihydroxycinnamic acid
C9H8O4              (Mass of molecular ion:    180)

   Source Temperature: 180 °C
   Sample Temperature: 170 °C
   Direct, 75 eV

      18.0       3.3
      26.0       1.4
      27.0       5.5
      28.0       3.6
      29.0       2.3
      37.0       1.4
      38.0       3.2
      39.0       9.9
      40.0       1.3
      41.0       1.6
      43.0       2.0
      44.0      22.1
      44.5       1.8
      45.0       1.9
      49.0       1.1
      50.0       6.1
      51.0      12.5
      52.0       5.4
      53.0       5.3
      53.5       1.5
      54.0       1.3
      55.0       5.8
      61.0       1.5
      62.0       6.6
      63.0      11.7
      64.0       3.4
      65.0       2.4
      66.0       1.2
      67.0       4.5
      67.5       2.2
      68.0       2.5
      69.0       2.4
      74.0       1.7
      75.0       1.3
      76.0       1.7
      77.0      12.2
      78.0       7.4
      79.0       6.8
      80.0       1.5
      81.0       2.4
      81.5       1.9
      82.0       1.1
      87.0       1.4
      88.0       4.0
      89.0      26.5
      90.0       9.2
      91.0       1.7
      92.0       1.2
      93.0       1.3
      95.0       1.3
     105.0       3.5
     106.0       5.2
     107.0       8.0
     108.0       1.5
     110.0       5.6
     117.0       9.5
     118.0       2.5
     119.0       1.8
     120.0       1.0
     123.0       6.0
     126.0       1.3
     133.0       3.1
     134.0      33.9
     135.0      21.0
     136.0      63.1
     137.0       5.9
     138.0       1.7
     139.0       1.0
     144.0       1.0
     145.0       5.6
     151.0       1.2
     152.0       2.1
     161.5       1.1
     162.0       4.1
     162.5       5.8
     163.0      24.0
     164.0       2.9
     170.0       1.5
     179.0      14.6
     180.0     100.0
     181.0      10.1
     182.0       1.4

Assign. Shift(ppm) A 7.417 B 7.03 C 7.00 D 6.781 E 6.195 F 6.2 J(A,E)=15.9HZ.

     Hz     ppm     Int.

    673.34   7.519    491
    657.42   7.341    660
    629.69   7.031   1000
    621.48   6.940    474
    619.73   6.920    384
    609.96   6.811    758
    602.05   6.723    365
    561.72   6.272    835
    545.80   6.095    649