method evaluations

1 2s

rejection warning
1 3s

reject a run when control observation is +/- 3s
2 2s

reject run when 2 consecutive control observations are on the same side of the mean and > +2s
4 1s

reject a run when 4 consecutive controls are on the same side of the mean and > +1s
R 4s

reject a run if the range or difference between the maximum and minimum controls are >4s
for how long can controls be stable for

1 yr
what are quality controls used for

to monitor and determine analytical errors by comparing expected values within control limits (ranges)
Precision error equation

[(value - mean)/mean]x100%
accuracy equation

[(value-true value)/true value] x 100%
what is the confidence interval

+/- 2s, 95% confidence interval
what are the types of systematic errors
- proportional error
- constant error
what are the requirements for QC material
- stable
- concentration must be within range
- matrix = synthetic.

Author

tanyalequang

342518

Card Set

method evaluations

Description

-QC -systematic error -random error -precision -accuracy

Updated

2018-09-25T17:48:31Z

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