Anions in seawater - Determination of Anions in Natural and Treated Waters - page 397

Extracting solvent 5ml of a 1:3 mixture of toluene and 4-methylpentan-2-one Phosphorus 0-
0.8µg
*Organic phase volume was assumed to be 5ml
†7ml of extracting solvent were used
Source: Reproduced with permission from Elsevier Science [172]

Table 3.12 Effect of other ions

Concentration mol L −1

Ion Added as Absorbance*

None 0.549

Na + , Cl−

NaCl 0.3 0.545

K +

KCl

1×10 −2

0.548

SO 4 2−

Na 2 SO 4

1×10 −2

0.552

Ca 2+

CaCl 2

1×10 −2

0.551

Mg 2+

MgCl 2

1×10 −2

0.548

HCO 3 - NaHCO 1

1×10 −2

0.556

Al 3+

K Al(SO 4 ) 2

1×10 −3

0.550

Fe 3+

FeNH 4 (SO 4 ) 2

1×10 −3

0.551

NH 4 Cl

1×10 −3

NH4+ 0.557

NO 3 - NaNO 3

1×10 −3

0.548

Cr 3+

CrCl 3

1×10 −3

0.549

Mn 2+

MnCl 2

1×10 −3

0.549

Co 2+

CoCl 2

1×10 −3

0.549

Cd 2 +

CdCl 2

1×10 −3

0.552

Ni 2+

NiCl 2

1×10 −3

0.549

Cu 2+

CuCl 2

1×10 −3

0.553

Zn 2 +

ZnCl 2

1×10 −3

0.546

Br− NaBr

1×10 −3

0.546

Na 2 B 4 O 7 B(III)

1×10 −3

0.552

SiO 3 2 -

Na 2 SiO 3

5×10− 4 †

0.553

VO 3 - NH 4 VO 3

1×10−5 0.556

WO 4 2-

(NH 4 ) 10 W 12 O 41

1×10 −5

0.554

I -

Nal

1×10 −5

0.550

5×10 −6 †

Laurylsulphate Na salt 0.549