Solubility Of Oxygen In Water As A Function Of Temperature And Salinity - Mettler Toledo SevenGo Duo pro SG68 Instrucciones De Manejo

c O
2
c O
s 2
p Standard pressure (1013 mbar)
n
p Water vapor pressure at calibration temperature (mbar)
w
X Molar ratio of O
O2
S Sensor slope (pA/mbar)
L
Sal Salinity of measuring solution (g/kg)
F(T) Temperature-dependant salinity correction factor (see "Solubility of oxygen in water as a function
of temperature and salinity")
To calculate the saturation [%], the term
is replaced by 100%
S the sensor slope is determined in the calibration using the following equation:
L
S Sensor slope (pA/mbar)
L
I Converted sensor current during calibration
cal
I Sensor residual current (assumed to be zero)
0
X Molar ratio of O2 in calibration gas (in air equal to 0.2095)
O2
p Pressure of calibration gas (air pressure, in mbar)
cal
rH Relative humidity of calibration gas (0.0É1.0)
p Water vapor pressure at calibration temperature (mbar)
w

11.3 Solubility of oxygen in water as a function of temperature and salinity

According to EN 25 814 and UNESCO tables (partly extrapolated)
Temperature
(°C)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
36 Appendix​ ​
concentration (ppm or mg/L)
solubility in water (mg/L) at p
in calibration gas (in air equal to 0.2095)
2
O solubility Salinity correction factor F(T)
2
(mg/L) (mg/L)
14.62 0.0875
14.22 0.0843
13.83 0.0818
13.46 0.0789
13.11 0.0760
12.77 0.0739
12.45 0.0714
12.14 0.0693
11.84 0.0671
11.56 0.0650
11.29 0.0632
11.03 0.0614
10.78 0.0593
10.54 0.0582
, (see Section 8.3)
n
SevenGo Duo pro™