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Wm. Craig Byrdwell, phd |
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Resources for Lipid Analysis in the 21st Century |
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For a conveniently printable .pdf version of this mass list, click HERE |
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c = cis double bond, t = trans d.b., n– refers to the first double bond position, from the end of the fatty acid chain. The above list includes only the most common fatty acids. A more complete list of fatty acids, according to their trivial names, may be found at : |
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Disclaimer: Not all fragments listed here are observed from every class of phospholipid. Every possible adduct and most fragments have been listed here for the sake of thoroughness, whether they are actually observed or not. The page for each phospholipid class will be tailored as time permits. |
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© 2005-2011 The figures and tables on this website are copyrighted in 2005-2011 by William Craig Byrdwell and Byrdwell.com. Please reference
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Fatty Acids and Related Masses |
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Systematic Fatty Acid Name |
Common Fatty Acid Name |
Abbrev. |
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Fatty Acid Mass |
[RCOO+58]+ |
[RCO]+ |
[RCOO]– |
Pure Triacylglycerol |
Intact Diacylglycerol |
[DAG]+ Fragment |
Intact Monoacylglycerol |
Fatty Acid Methyl Ester |
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C |
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U |
ECN |
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(– mode) |
(TAG) |
(DAG) |
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(MAG) |
(FAME) |
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Butanoic |
Butyric |
Bu |
4 |
: |
0 |
4 |
88.05 |
145.09 |
71.05 |
87.04 |
302.17 |
232.13 |
215.13 |
162.09 |
102.07 |
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Pentanoic |
Valeric |
V |
5 |
: |
0 |
5 |
102.07 |
159.10 |
85.07 |
101.06 |
344.22 |
260.16 |
243.16 |
176.10 |
116.08 |
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Hexanoic |
Caproic |
Co |
6 |
: |
0 |
6 |
116.08 |
173.12 |
99.08 |
115.08 |
386.27 |
288.19 |
271.19 |
190.12 |
130.10 |
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Heptanoic |
Enanthic |
En |
7 |
: |
0 |
7 |
130.10 |
187.13 |
113.10 |
129.09 |
428.31 |
316.22 |
299.22 |
204.14 |
144.12 |
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Octanoic |
Caprylic |
Cy |
8 |
: |
0 |
8 |
144.12 |
201.15 |
127.11 |
143.11 |
470.36 |
344.26 |
327.25 |
218.15 |
158.13 |
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Nonanoic |
Pelargonic |
Pg |
9 |
: |
0 |
9 |
158.13 |
215.16 |
141.13 |
157.12 |
512.41 |
372.29 |
355.28 |
232.17 |
172.15 |
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Decanoic |
Capric |
Ca |
10 |
: |
0 |
10 |
172.15 |
229.18 |
155.14 |
171.14 |
554.45 |
400.32 |
383.32 |
246.18 |
186.16 |
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Hendecanoic |
----- |
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11 |
: |
0 |
11 |
186.16 |
243.20 |
169.16 |
185.15 |
596.50 |
428.35 |
411.35 |
260.20 |
200.18 |
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Dodecanoic |
Lauric |
La |
12 |
: |
0 |
12 |
200.18 |
257.21 |
183.17 |
199.17 |
638.55 |
456.38 |
439.38 |
274.21 |
214.19 |
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Tridecanoic |
----- |
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13 |
: |
0 |
13 |
214.19 |
271.23 |
197.19 |
213.19 |
680.60 |
484.41 |
467.41 |
288.23 |
228.21 |
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Tetradecanoic |
Myristic |
M |
14 |
: |
0 |
14 |
228.21 |
285.24 |
211.21 |
227.20 |
722.64 |
512.44 |
495.44 |
302.25 |
242.22 |
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Pentadecanoic |
----- |
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15 |
: |
0 |
15 |
242.22 |
299.26 |
225.22 |
241.22 |
764.69 |
540.48 |
523.47 |
316.26 |
256.24 |
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Hexadecanoic |
Palmitic |
P |
16 |
: |
0 |
16 |
256.24 |
313.27 |
239.24 |
255.23 |
806.74 |
568.51 |
551.50 |
330.28 |
270.26 |
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c-9-Hexadecenoic |
Palmitoleic (n-7) |
Po |
16 |
: |
1 |
14 |
254.22 |
311.26 |
237.22 |
253.22 |
800.69 |
564.48 |
547.47 |
328.26 |
268.24 |
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Heptadecanoic |
Margaric |
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17 |
: |
0 |
17 |
270.26 |
327.29 |
253.25 |
269.25 |
848.78 |
596.54 |
579.54 |
344.29 |
284.27 |
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Octadecanoic |
Stearic |
S |
18 |
: |
0 |
18 |
284.27 |
341.31 |
267.27 |
283.26 |
890.83 |
624.57 |
607.57 |
358.31 |
298.29 |
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c-9-Octadecenoic |
Oleic (n-9) |
O |
18 |
: |
1 |
16 |
282.26 |
339.29 |
265.25 |
281.25 |
884.78 |
620.54 |
603.54 |
356.29 |
296.27 |
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t-9-Octadecenoic |
Elaidic |
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18 |
: |
1 |
16 |
282.26 |
339.29 |
265.25 |
281.25 |
884.78 |
620.54 |
603.54 |
356.29 |
296.27 |
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c-9,12-Octadecadienoic |
Linoleic (n-9) |
L |
18 |
: |
2 |
14 |
280.24 |
337.27 |
263.24 |
279.23 |
878.74 |
616.51 |
599.50 |
354.28 |
294.26 |
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c-6,9,12-Octadecatrienoic |
g-Linolenic (n-6) |
Ln |
18 |
: |
3 |
12 |
278.22 |
335.26 |
261.22 |
277.22 |
872.69 |
612.48 |
595.47 |
352.26 |
292.24 |
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Nonadecanoic |
----- |
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19 |
: |
0 |
19 |
298.29 |
355.32 |
281.28 |
297.28 |
932.88 |
652.60 |
635.60 |
372.32 |
312.30 |
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Eicosanoic |
Arachidic |
A |
20 |
: |
0 |
20 |
312.30 |
369.34 |
295.30 |
311.30 |
974.92 |
680.63 |
663.63 |
386.34 |
326.32 |
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c-9-Eicosenoic |
Gadoleic (n-11) |
G |
20 |
: |
1 |
18 |
310.29 |
367.32 |
293.28 |
309.28 |
968.88 |
676.60 |
659.60 |
384.32 |
324.30 |
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c-11-Eicosenoic |
Gondoic (n-9) |
Go |
20 |
: |
1 |
18 |
310.29 |
367.32 |
293.28 |
309.28 |
968.88 |
676.60 |
659.60 |
384.32 |
324.30 |
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c-8,11,14-Eicosatrienoic |
Homo-g-Linolenic (n-6) |
hL |
20 |
: |
3 |
14 |
306.26 |
363.29 |
289.25 |
305.25 |
956.78 |
668.54 |
651.54 |
380.29 |
320.27 |
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c-5,8,11,14-Eicosatetraenoic |
Arachidonic (n-6) |
Ao |
20 |
: |
4 |
12 |
304.24 |
361.27 |
287.24 |
303.23 |
950.74 |
664.51 |
647.50 |
378.28 |
318.26 |
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Heneicosanoic |
----- |
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21 |
: |
0 |
21 |
326.32 |
383.35 |
309.32 |
325.31 |
1016.97 |
708.66 |
691.66 |
400.36 |
340.33 |
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Docosanoic |
Behenic |
B |
22 |
: |
0 |
22 |
340.33 |
397.37 |
323.33 |
339.33 |
1059.02 |
736.69 |
719.69 |
414.37 |
354.35 |
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c-13-Docosenoic |
Erucic (n-9) |
E |
22 |
: |
1 |
20 |
338.32 |
395.35 |
321.32 |
337.31 |
1052.97 |
732.66 |
715.66 |
412.36 |
352.33 |
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Tetracosanoic |
Lignoceric |
Lg |
24 |
: |
0 |
24 |
368.37 |
425.40 |
351.36 |
367.36 |
1143.11 |
792.76 |
775.75 |
442.40 |
382.38 |
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c-15-Tetracosenoic |
Nervonic (n-9) |
N |
24 |
: |
1 |
22 |
366.35 |
423.38 |
349.35 |
365.34 |
1137.06 |
788.73 |
771.72 |
440.39 |
380.37 |