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Wm. Craig Byrdwell, phd |
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Resources for Lipid Analysis in the 21st Century |
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Copyright © 2005-2011 Byrdwell.com
The figures and tables on this website are copyrighted in 2005-2011 by William Craig Byrdwell. If you use these tables please reference www.Sphingomyelin.com |
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Calculated monoisotopic masses of Sphingomyelin and Dihydrosphingomyelin and their adducts and fragments are based on the following atomic isotope masses:
1H = 1.0078250321 12C = 12.000000 14N = 14.0030740052 16O = 15.9949146221 23Na = 22.98976967 31P = 30.97376151
These masses are the most recent suggested isotopic masses from the National Institute of Standards and Technology (NIST) at:
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The most common Sphingomyelin (SM) molecular species in most tissue types have a d18:1 Sphingenine Long-Chain Base (LCB). Those molecular species are given on this page. Sphingomyelin Long-Chain Bases other than d18:1, which are abundant in some samples such as cow’s milk, are given on other Sphingomyelin pages listed on the Navigation Menu, and in the Master List. |
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*NOTE: APCI-MS gives fragments at [M+45-2H]– in negative-ion mode, not [M+45]–, meaning that two hydrogens are lost from the formate adduct. |
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Calculated Monoisotopic Masses for Sphingomyelin Species with an 18:1 Long-Chain Base |
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18:1 LCB |
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+ESI |
-ESI* |
-ESI/-APCI |
+APCI |
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CN:d.b. |
[M+H]+ |
[M+Na]+ |
[M+K]+ |
[M +45]- formate adduct |
[M-15]- |
[Cer-H2O+H]+ |
[Cer-2H2O+H]+ |
[FA (L)]+ |
[FA (S)]+ |
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6:0 |
563.42 |
585.40 |
601.37 |
607.41 |
547.39 |
380.35 |
362.34 |
140.11 |
116.11 |
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6:1 |
561.40 |
583.39 |
599.36 |
605.39 |
545.37 |
378.34 |
360.33 |
138.09 |
114.09 |
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8:0 |
591.45 |
613.43 |
629.41 |
635.44 |
575.42 |
408.38 |
390.37 |
168.14 |
144.14 |
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8:1 |
589.43 |
611.42 |
627.39 |
633.42 |
573.40 |
406.37 |
388.36 |
166.12 |
142.12 |
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10:0 |
619.48 |
641.46 |
657.44 |
663.47 |
603.45 |
436.42 |
418.40 |
196.17 |
172.17 |
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10:1 |
617.47 |
639.45 |
655.42 |
661.46 |
601.43 |
434.40 |
416.39 |
194.15 |
170.15 |
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12:0 |
647.51 |
669.49 |
685.47 |
691.50 |
631.48 |
464.45 |
446.44 |
224.20 |
200.20 |
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12:1 |
645.50 |
667.48 |
683.45 |
689.49 |
629.47 |
462.43 |
444.42 |
222.19 |
198.19 |
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12:2 |
643.48 |
665.46 |
681.44 |
687.47 |
627.45 |
460.42 |
442.40 |
220.17 |
196.17 |
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13:0 |
661.53 |
683.51 |
699.48 |
705.52 |
645.50 |
478.46 |
460.45 |
238.22 |
214.22 |
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13:1 |
659.51 |
681.49 |
697.47 |
703.50 |
643.48 |
476.45 |
458.44 |
236.20 |
212.20 |
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13:2 |
657.50 |
679.48 |
695.45 |
701.49 |
641.47 |
474.43 |
456.42 |
234.19 |
210.19 |
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14:0 |
675.54 |
697.53 |
713.50 |
719.53 |
659.51 |
492.48 |
474.47 |
252.23 |
228.23 |
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14:1 |
673.53 |
695.51 |
711.48 |
717.52 |
657.50 |
490.46 |
472.45 |
250.22 |
226.22 |
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14:2 |
671.51 |
693.49 |
709.47 |
715.50 |
655.48 |
488.45 |
470.44 |
248.20 |
224.20 |
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15:0 |
689.56 |
711.54 |
727.52 |
733.55 |
673.53 |
506.49 |
488.48 |
266.25 |
242.25 |
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15:1 |
687.54 |
709.53 |
725.50 |
731.53 |
671.51 |
504.48 |
486.47 |
264.23 |
240.23 |
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15:2 |
685.53 |
707.51 |
723.48 |
729.52 |
669.50 |
502.46 |
484.45 |
262.22 |
238.22 |
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16:0 |
703.58 |
725.56 |
741.53 |
747.57 |
687.54 |
520.51 |
502.50 |
280.26 |
256.26 |
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16:1 |
701.56 |
723.54 |
739.52 |
745.55 |
685.53 |
518.49 |
500.48 |
278.25 |
254.25 |
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16:2 |
699.54 |
721.53 |
737.50 |
743.53 |
683.51 |
516.48 |
498.47 |
276.23 |
252.23 |
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17:0 |
717.59 |
739.57 |
755.55 |
761.58 |
701.56 |
534.53 |
516.51 |
294.28 |
270.28 |
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17:1 |
715.58 |
737.56 |
753.53 |
759.57 |
699.54 |
532.51 |
514.50 |
292.26 |
268.26 |
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17:2 |
713.56 |
735.54 |
751.52 |
757.55 |
697.53 |
530.49 |
512.48 |
290.25 |
266.25 |
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18:0 |
731.61 |
753.59 |
769.56 |
775.60 |
715.58 |
548.54 |
530.53 |
308.30 |
284.30 |
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18:1 |
729.59 |
751.57 |
767.55 |
773.58 |
713.56 |
546.53 |
528.51 |
306.28 |
282.28 |
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18:2 |
727.58 |
749.56 |
765.53 |
771.57 |
711.54 |
544.51 |
526.50 |
304.26 |
280.26 |
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18:3 |
725.56 |
747.54 |
763.52 |
769.55 |
709.53 |
542.49 |
524.48 |
302.25 |
278.25 |
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19:0 |
745.62 |
767.60 |
783.58 |
789.61 |
729.59 |
562.56 |
544.55 |
322.31 |
298.31 |
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19:1 |
743.61 |
765.59 |
781.56 |
787.60 |
727.58 |
560.54 |
542.53 |
320.30 |
296.30 |
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19:2 |
741.59 |
763.57 |
779.55 |
785.58 |
725.56 |
558.53 |
540.51 |
318.28 |
294.28 |
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20:0 |
759.64 |
781.62 |
797.59 |
803.63 |
743.61 |
576.57 |
558.56 |
336.33 |
312.33 |
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20:1 |
757.62 |
779.60 |
795.58 |
801.61 |
741.59 |
574.56 |
556.55 |
334.31 |
310.31 |
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20:2 |
755.61 |
777.59 |
793.56 |
799.60 |
739.58 |
572.54 |
554.53 |
332.30 |
308.30 |
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21:0 |
773.65 |
795.64 |
811.61 |
817.64 |
757.62 |
590.59 |
572.58 |
350.34 |
326.34 |
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21:1 |
771.64 |
793.62 |
809.59 |
815.63 |
755.61 |
588.57 |
570.56 |
348.33 |
324.33 |
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21:2 |
769.62 |
791.60 |
807.58 |
813.61 |
753.59 |
586.56 |
568.55 |
346.31 |
322.31 |
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22:0 |
787.67 |
809.65 |
825.63 |
831.66 |
771.64 |
604.60 |
586.59 |
364.36 |
340.36 |
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22:1 |
785.65 |
807.64 |
823.61 |
829.64 |
769.62 |
602.59 |
584.58 |
362.34 |
338.34 |
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22:2 |
783.64 |
805.62 |
821.59 |
827.63 |
767.61 |
600.57 |
582.56 |
360.33 |
336.33 |
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23:0 |
801.68 |
823.67 |
839.64 |
845.67 |
785.65 |
618.62 |
600.61 |
378.37 |
354.37 |
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23:1 |
799.67 |
821.65 |
837.63 |
843.66 |
783.64 |
616.60 |
598.59 |
376.36 |
352.36 |
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23:2 |
797.65 |
819.64 |
835.61 |
841.64 |
781.62 |
614.59 |
596.58 |
374.34 |
350.34 |
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24:0 |
815.70 |
837.68 |
853.66 |
859.69 |
799.67 |
632.63 |
614.62 |
392.39 |
368.39 |
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24:1 |
813.68 |
835.67 |
851.64 |
857.67 |
797.65 |
630.62 |
612.61 |
390.37 |
366.37 |
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24:2 |
811.67 |
833.65 |
849.63 |
855.66 |
795.64 |
628.60 |
610.59 |
388.36 |
364.36 |
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25:0 |
829.72 |
851.70 |
867.67 |
873.71 |
813.68 |
646.65 |
628.64 |
406.40 |
382.40 |
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25:1 |
827.70 |
849.68 |
865.66 |
871.69 |
811.67 |
644.63 |
626.62 |
404.39 |
380.39 |
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25:2 |
825.68 |
847.67 |
863.64 |
869.67 |
809.65 |
642.62 |
624.61 |
402.37 |
378.37 |
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26:0 |
843.73 |
865.71 |
881.69 |
887.72 |
827.70 |
660.67 |
642.66 |
420.42 |
396.42 |
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26:1 |
841.72 |
863.70 |
879.67 |
885.71 |
825.68 |
658.65 |
640.64 |
418.40 |
394.40 |
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26:2 |
839.70 |
861.68 |
877.66 |
883.69 |
823.67 |
656.63 |
638.62 |
416.39 |
392.39 |