C (IS): the concentration of internal standard solution
E (IS): the potential of internal standard solution
8.6.3.3 concentration calculation
The calculation of routine sample, STAT sample, and concentration of quality
control liquid is based on the concentration of internal standard solution.
Internal standard solution is different with the different sample.
() ( )
( ) ( ) 10
E S E IS
SL
C S C IS
−
= ×
………………………………………… (5)
C(S) : Sample concentration
E(S): Sample potential
8.6.3.4 result modification
Test calibrator (calibrator S3)of serum category after calibration to
calculate its concentration, and the difference between the tested
concentration and input value is used as compensation value to increase or
decrease sample quantitative value.
( ) () ()C VALUE C C C X= −
………………………………………… (6)
C (VALUE): compensation value (compensation value)
C (C): Concentration input value of the serum calibrator
C (X): Concentration tested value of the serum calibrator
{ }
'
() () ( )C S IF C S C VALUE= +
.. ... ... ... ... ... ... ... ... ... ... ..
. ... ... (7)
C '(S): modified sample concentration
IF: Instrument constant (usually 1.0)
8.6.3.5 Standard specification of electrolyte
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