MINERAL MAKEUP OF SEAWATER

In order of most to least:

ELEMENT

MOLECULAR WEIGHT

PPM IN SEAWATER

MOLAR CONCENTRATION

Chloride

35.4

18980

0.536158

Sodium

23

10561

0.459174

Magnesium

24.3

1272

0.052346

Sulfur

32

884

0.027625

Calcium

40

400

0.01

Potassium

39.1

380

0.009719

Bromine

79.9

65

0.000814

Carbon(inorganic)

12

28

0.002333

Strontium

87.6

13

0.000148

Boron

10.8

4.6

0.000426

Silicon

28.1

4

0.000142

Carbon (organic)

12

3

0.00025

Aluminum

27

1.9

0.00007

Fluorine

19

1.4

0.000074

N as nitrate

14

0.7

0.00005

Nitrogen (organic)

14

0.2

0.000014

Rubidium

85

0.2

0.0000024

Lithium

6.9

0.1

0.000015

P as Phosphate

31

0.1

0.0000032

Copper

63.5

0.09

0.0000014

Barium

137

0.05

0.00000037

Iodine

126.9

0.05

0.00000039

N as nitrite

14

0.05

0.0000036

N as ammonia

14

0.05

0.0000036

Arsenic

74.9

0.024

0.00000032

Iron

55.8

0.02

0.00000036

P as organic

31

0.016

0.00000052

Zinc

65.4

0.014

0.00000021

Manganese

54.9

0.01

0.00000018

Lead

207.2

0.005

0.000000024

Selenium

79

0.004

0.000000051

Tin

118.7

0.003

0.000000025

Cesium

132.9

0.002

0.000000015

Molybdenum

95.9

0.002

0.000000021

Uranium

238

0.0016

0.0000000067

Gallium

69.7

0.0005

0.0000000072

Nickel

58.7

0.0005

0.0000000085

Thorium

232

0.0005

0.0000000022

Cerium

140

0.0004

0.0000000029

Vanadium

50.9

0.0003

0.0000000059

Lanthanum

139.9

0.0003

0.0000000022

Yttrium

88.9

0.0003

0.0000000034

Mercury

200.6

0.0003

0.0000000015

Silver

107.9

0.0003

0.0000000028

Bismuth

209

0.0002

0.00000000096

Cobalt

58.9

0.0001

0.0000000017

Gold

197

0.000008

0.00000000004