Cover Image

PAPERBACK
$59.00



View/Hide Left Panel

TABLE 8-1 Natural Abundance of Elements Commonly Found in Biological Substances

Element

Mass

Abundance (%)

Hydrogen

1

99.985

 

2

0.015

Carbon

12

98.89

 

13

1.11

 

14

*

Nitrogen

14

99.63

 

15

0.37

Oxygen

16

99.76

 

17

0.04

 

18

0.20

Sodium

23

100

Phosphorus

31

100

Sulfur

32

95.02

 

33

0.75

 

34

4.21

 

36

0.02

Chloride

35

75.77

 

37

24.23

Potassium

39

93.258

 

40

0.012

 

41

6.730

Iodine

127

100

* Approximately 6.1 pCi/g carbon depending on carbon source. 14C production rate = ~1.8 atoms/cm2 sec.

enriched, minor, stable isotopic nuclides of the elements were generally unavailable, save for deuterium. This situation has changed dramatically over the last two decades. Now, except for enriched stable isotopic forms of the mineral elements, which remain in short supply and are prohibitively expensive, the stable isotopes of carbon, hydrogen, nitrogen, and oxygen and a wide variety of biochemicals containing these nuclides are commercially available in relative abundance. Similarly, analytical instrumentation for routine measurements of these isotopes is now widely available and, because of the advances in computer



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement