Natural Seawaters - Major Components

		TABLE 1. MAJOR^* IONIC COMPONENTS OF NATURAL SEAWATERS (NSWs)

^*"Major" is defined here as >100 parts per million. These six components account for more than 99% of the dissolved solids in NSWs [A3]. Additional information on average values, measurement ranges, and original sources can be found in [A4].

Ion Avg. g/kg NSW of
Salinity = 35^o/oo[A4]] Percentage of Total
Dissolved Solids [A3]

Chloride (Cl^-) 19.353 55.04

Sodium (Na⁺) 10.760 30.61

Sulfate (SO₄^{- -}) 2.712 7.68

Magnesium (Mg⁺⁺) 1.297 3.69

Calcium (Ca⁺⁺) 0.412 1.16

Potassium (K⁺) 0.399 1.10

Ion	Avg. g/kg NSW of Salinity = 35^o/oo[A4]]	Percentage of Total Dissolved Solids [A3]

Chloride (Cl^-)	19.353	55.04
Sodium (Na⁺)	10.760	30.61
Sulfate (SO₄^{- -})	2.712	7.68
Magnesium (Mg⁺⁺)	1.297	3.69
Calcium (Ca⁺⁺)	0.412	1.16
Potassium (K⁺)	0.399	1.10

TABLE 1. MAJOR* IONIC COMPONENTS OF NATURAL SEAWATERS (NSWs)

TABLE 1. MAJOR^* IONIC COMPONENTS
OF NATURAL SEAWATERS (NSWs)