A Partial List of Common Fragment Losses.

This list should be adequate for the solution of all examples. A more complete list of common fragments can be obtained from the references listed below. You may find it useful to print out this table for use in the interpretation units.

• 15 •CH₃
• 16 O, •NH₂
• 17 HO•
• 18 H₂O
• 19 F•
• 20 HF
• 26 CHCH, •CHN
• 27 CH₂=CH•, HCN
• 28 CH₂=CH₂, CO
• 29 CH₃CH₂•, •CHO
• 30 NH₂CH₂•, CH₂O, NO, C₂H₆
• 31 •OCH₃, •CH₂OH, CH₂NH₂
• 32 CH₃OH, S
• 33 HS•, (•CH₃ and H₂O)
• 34 H₂S
• 35 Cl•
• 36 HCl, 2 H₂O
• 37 H₂Cl
• 38 C₃H₂, C₂N, F₂
• 39 C₃H₃, HC₂N
• 40 CH₃CCH
• 41 CH₂=CHCH₂•
• 42 CH₂=CHCH₃, CH₂=C=O
• 43 C₃H₇, CH₃C•=O
• 44 CH₂=CHOH, CO₂, N₂O, CONH₂
• 45 CH₃CHOH, CH₃CH₂O•, CO₂H, CH₃CH₂NH₂
• 46 (H₂O and CH₂=CH₂), CH₃CH₂OH
• 47 CH₃S•
• 48 CH₃SH
• 49 •CH₂Cl
• 52 C₄H₄
• 53 C₄H₅
• 54 CH₂=CH-CH-CH₂
• 55 CH₂=CHCHCH₃
• 56 CH₂=CHCH₂CH₃
• 57 C₄H₉•, C₂H₅CO
• 60 C₃H₇OH
• 63 •CH₂CH₂Cl
• 71 C₅H₁₁•
• 73 CH₃CH₂OC(=O)•
• 74 C₄H₉OH
• 75 C₆H₃
• 76 C₆H₄
• 77 C₆H₅
• 78 C₆H₆

References

Hamming, M and N. Foster. Interpretation of Mass Spectra of Organic Compounds. New York, NY. Academic Press.

McLafferty, F. W. Interpretation of Mass Spectra. Mill Valley, CA. University Scientific Books.

Silverstein, R, G. Bassler and T. Morrill. Spectrometric Identification of Organic Compounds. New York, NY. John Wiley and Sons. Inc.