RADIOMETER ABL800 FLEX - Page 34

ABL800 FLEX Reference Manual 1. Potentiometric measuring principles
Electrolyte electrodes, Continued
Corrections
The measured electrolyte concentration is then corrected for systematic deviations
from the reference method by the following equations:
Equation A:
ccX(sample,corr) X(sample)
195 L µµ µ
=
×
+
A
0(195 L) (195 L)
A
1
and
Equation B:
cX(sample,corr,micromode) = A
0
(micromode)
195 µL
× cX(sample,corr) +
A
1
(micromode)
where:
cX(sample) = uncorrected value of the electrolyte ion in the sample
cX(sample,corr) = corrected value of the electrolyte ion in the sample
A
0
= instrument-dependent correction factor
A
1
= instrument-dependent correction cut-off
Chloride is corrected for interference. The default value
mmol/L is used in
−
3
HCOc 5.24HCO
3
=
−
c
Equation C:
(
)
L)(19513
-
L)(1950L195
-
HCO0956.0(sample)ClAcorr)(sample,Cl
µµµ
Accc +×−×=
−
Note that subscript “195 µL” in the equations above is used for convenience sake
and stands for “FLEXMODE (no message)” and “FLEXMODE (message 874)”.
Corrections for cNa
+
:
ABL8XX
FLEX
Mode A
0
A
1
Equation
35/25/15 S195 0.995 -3.00 A
S95 1.01 1.80 A, B
C95 1.03 -1.09 A, B
*FM (no message) 0.995 -3.00 A
*FM (message 874) 1.030 -1.00 A, B
*FM = FLEXMODE.
Continued on next page
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