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Cartridge Chemistry: Calibration Theory
Endpoint and First-Order Calibration Formulas
System Description
UniCel DxC Systems Instructions For Use A13914
Page 2-42
October 2005
Nonblanked
Rate
Chemistries
FOR HIGH CALIBRATOR LEVEL:
Reaction Rate = Rate
rep1
Reaction Rate = Rate
rep2
(Rate
rep1
+ Rate
rep2
) × 0.5 = Rate
avg
(hi)
FOR LOW CALIBRATOR LEVEL:
Reaction Rate = Rate
rep1
Reaction Rate = Rate
rep2
(Rate
rep1
+ Rate
rep2
) × 0.5 = Rate
avg
(lo)
Offset = Cal Set Point (hi) - [Cal Factor × Rate
avg
(hi)]
Sample values are calculated by the following equation:
(Reaction Rate × Cal Factor) + offset = sample value
NOTICE
For single point linear calibration, the low calibrator is a fixed zero
point and the offset is equal to zero.
Table 2.12
Calculation of Calibration Factors for Endpoint and Rate
Chemistries
, continued
Type
Formula
(4 of 6)
E014418L.EPS
Cal Factor (Slope) =
Rate
avg
(hi) – Rate
avg
(lo)
Cal Set Point (hi) – Cal Set Point (lo)