IonSource Mass Table

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Atomic Masses and Abundances for a Subset of Naturally Occurring Biologically Relevant Isotopes

Iso

A

%

Iso

A+1

%

Iso

A+2

%

Iso

A+3

%

Iso

A+4

%

12C

12

98.93(8)

13C

13.0033548378(10)

1.07(8)

14C

14.003241988(4)

-

-

-

-

-

-

-

1H

1.0078250321(4)

99.9885(70)

2H

2.0141017780(4)

0.0115(70)

3H

3.0160492675(11)

-

-

-

-

-

-

-

14N

14.0030740052(9)

99.632(7)

15N

15.0001088984(9)

0.368(7)

-

-

-

-

-

-

-

-

-

16O

15.9949146221(15)

99.757(16)

17O

16.99913150(22)

0.038(1)

18O

17.9991604(9)

0.205(14)

-

-

-

-

-

-

32S

31.97207069(12)

94.93(31)

33S

32.97145850(12)

0.76(2)

34S

33.96786683(11)

4.29(28)

-

-

-

36S

35.96708088(25)

0.02(1)
. . . . . . . . . . . . . . .

19F

18.99840320(7)

100

-

-

-

-

-

-

-

-

-

-

-

-

23Na

22.98976967(23)

100

-

-

-

-

-

-

-

-

-

-

-

-

39K

38.9637069(3)

93.2581(44)

40K

39.96399867(29)

0.0117(1)

41K

40.96182597(28)

6.7302(44)

-

-

-

-

-

-

31P

30.97376151(20)

100

-

-

-

-

-

-

-

-

-

-

-

-

35Cl

34.96885271(4)

75.781(4)

-

-

-

37Cl

36.96590260(5)

24.22(4)

-

-

-

-

-

-

55Mn

54.9380496(14)

100

-

-

-

-

-

-

-

-

-

-

-

-

54Fe

53.9396148(14)

5.845(35)

-

-

-

56Fe

55.9349421(15)

91.754(36)

57Fe

56.9353987(15)

2.119(10)

58Fe

57.9332805(15)

0.282(4)

63Cu

62.9296011(15)

69.17(3)

-

-

-

65Cu

64.9277937(19)

30.83(3)

-

-

-

-

-

-

79Br

78.9183376(20)

50.69(7)

-

-

-

81Br

80.916291(3)

49.31(7)

-

-

-

-

-

-

127I

126.904468(4)

100

-

-

-

-

-

-

-

-

-

-

-

-
Web Reference:  Coursey, J. S., Schwab, D. J., and Dragoset, R. A. (2001). Atomic Weights and Isotopic Compositions (version 2.3), [Online]. Available: http://physics.nist.gov/Comp [2002, April 22]. National Institute of Standards and Technology, Gaithersburg, MD.
Original Literature Source:
Originally published as T.B. Coplen, Atomic Weights of the Elements 1999, Pure Appl. Chem., 73(4), 667 (2001); K.J.R. Rosman and P.D.P. Taylor, Isotopic Compositions of the Elements 1997, J. Phys. Chem. Ref. Data, 27(6), 1275 (1998); and G. Audi and A.H. Wapstra, The 1995 Update To The Atomic Mass Evaluation, Nuclear Physics A, 595(4), 409 (1995).

The above table has been double checked against the reference material.  If you wish to validate this table against the original IUPAC values please send your findings to webmaster@ionsource.com  

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Last updated:  Tuesday, January 19, 2016 02:48:45 PM