Table 4.

Composition of seawater (mg/L).

$\mathbf{N}{\mathbf{O}}_3^{-}$	${\mathbf{HCO}}_3^{-}$	${\mathbf{SO}}_4^{2-}$	${\mathbf{Cl}}^{-}$	${\mathbf{NH}}_4^{+}$	${\mathbf{Ca}}^{2+}$	${\mathbf{Mg}}^{2+}$	pH
12.76	161.29	2176.12	17,533.33	$0.04$	407.83	1177.38	6.98