Metrohm 765 Dosimat - Manual (Page 19)

2.2 Modes
765 Dosimat
15
The following table shows factors for the most common ionic standards:
Cation Standard
prepared from:
Factor f Anion Standard
prepared from:
Factor f
Na + NaCl
NaNO
3
0.39339
0.27050 F - NaF 0.45245
K + KCl
KNO
3
0.52441
0.38670 Cl - NaCl
KCl
0.60666
0.47550
Ca 2+ CaCl
2
0.36111 Br - NaBr·2H
2
O
KBr
0.57514
0.67141
Ba 2+ BaCl
2
·2H
2
O
Ba(NO
3
)
2
0.56222
0.52550 I - KI 0.76444
Cu 2+ Cu(ClO
4
)
2
Cu(NO
3
)
2
·6H
2
O
0.24214
0.21494 SO
4
2- K
2
SO
4
0.55087
Pb 2+ Pb(ClO
4
)
2
·3H
2
O
Pb(NO
3
)
2
0.45028
0.62557 NO
3
- NaNO
3
KNO
3
0.72950
0.61319
PO
4
3- Na
2
HPO
4
·12H
2
O
Na
3
PO
4
·12H
2
O
0.26519
0.24985
The factor f as correction for substances with admixtures
e.g. water of crystallization, impurities, moisture.
The factor f as correction for the volume contraction
For the amount-of-substance concentration c (units mol/L and mmol/L) and the mass
concentration ρ (units g/L and mg/L), the concentration is referred to the volume of the
solution.
c
i
= n
i
/V resp. ρi= mi/V
where n
i
amount of substance i
m
i
mass of substance i
V volume of the solution