Mindray BA-88A, Operation Manual

Page: 92 / 107

6-4
This calibration method adopts five parameters:
0
R
,
a
,
b
,
c
and
d
.
This calibration method requires at least five calibrators. The concentration (or
activity) of calibrator 1 is 0, and the corresponding
R
is equal to
0
R
.
Parabola
Calibration formula:
c bC aC R
+ + =
2
This calibration method adopts three parameters:
a
,
b
and
c
.
This calibration method requires at least three calibrators. The calibration
parameters can be calculated through the method of polynomial least squares.
Spline
Calibration formula:
3 2
0
) ( ) ( ) (
i i i i i i i
C C c C C b C C a R R
− + − + − + =
This calibration method requires 2 to 6 calibrators. The number of calibrators is set
to be n, so the calibration method has 4(n-1) parameters in total:
i
R
0
,
i
a
,
i
b
and
i
c
.
6.3 Calculating Concentration
6.3.1 Calculating Concentration of Linearly Calibrated
Sample/control
One-point linear calibration
a
R
C
=
Where,
a
- calibration parameter
Two-point linear calibration
a
b R
C
−
=
Where,
a
,
b
- calibration parameters