Dear HP22
You will find here Sea water Seawater Characteristics in South Atlantic (near from Angola)
Chemical concentration (mg/liter)
Na+ 10178; K+ 279 ; Ca2+ 346; Mg2+ 1132; HCO3- 229;
SO4 2- 2435; Cl- 17166.
Physico-chemical properties
pH 8.1 ;NacL (EQUIVALENT) 31816 mg/l; Specific gravity
@20°C 1.021; Electrical conductivity (20°C) 45.06 mS/cm
source: petrol offshore specifications
Regards
JPPMJ