Fatty acid

Weight Formula

NCI fragment structure

Monitored ions m/z

m0

m + 1

m + 2

Acetic (C₂:0)

60.05

C₂H₃O₂

59

60

61

Acetic-d₄

64.08

C₂d₃O₂

62

63

Propionic (C₃:0)

74.08

C₃H₅O₂

73

74

75

Propionic-d₆

80.00

C₃d₅O₂

78

79

Butanoic (C₄:0)

88.11

C₄H₇O₂

87

88

89

Butanoic-d₈

95.99

C₄d₇O₂

94

95

Isobutanoic (C₄:0)

88.11

C₄H₇O₂

87

88

89

Valeric (C₅:0)

102.13

C₅H₉O₂

101

102

103

Valeric-d₉

111.19

C₅d₉O₂

110

111

Isovaleric (C₅:0)

102.13

C₅H₉O₂

101

102

103