Roche Cedex Bio User Manual

Roche Diagnostics
Operator’s Manual · Version 3.4 C-29
Cedex Bio analyzer 8 Data analysis methods
Quality control
Quality control
The Cedex Bio analyzer allows the performance of real-time quality control, which
consists of the actual control measurements and the preset quality control rules.
e For information on configuring and performing QC, see Control definitions on
page B-164 and Performing QC on page B-74.
Quality control methods
Quality Control is used to detect the following types of errors:
o Random errors are usually method-dependent and are caused by the scattering of
measurements.
o Systematic errors are usually analyzer-dependent and are caused by, for example,
inaccurate pipetting.
Ideally, quality control methods identify random and systematic errors which are
indications of the precision and accuracy of the analytical system. Quality control
materials used on Cedex Bio analyzer can only be defined as precision.
Precision
The common quantitative criteria for imprecision are the standard deviation and the
coefficient of variation.
Standard deviation.
Value of sample i.
Arithmetic mean value of all samples.
Number of samples.
Coefficient of variation.
s
Σ x
i
x
m
–()
2
n 1–()
---------------------------
=
CV %[]
s
x
m
------
100⋅=
s
x
i
x
m
n
CV

Roche Cedex Bio Specifications

General

Brand	Roche
Model	Cedex Bio
Category	Measuring Instruments
Language	English