1.1.7 Basic Principles and Techniques (Quality Assurance: Analytical Variation) Flashcards
Due to chance and not recur
a. Random error
b. Systematic error
a
Predictable pattern that may recur
a. Random error
b. Systematic error
b
Random Error Affects?
a. Precision
b. Accuracy
a
Systematic error affects
a. precision
b. Accuracy
b
Random error Violates what westgard rules?
12S
13S
R4S
Systematic error causes shift, trend and violates what Westguard rule?
22s
42s
81s
10mean
Instrument instability
a. Random error
b. Systematic error
a
Temp and voltage
a. Random error
b. Systematic error
a
Deterioration of reagents
a. Random error
b. Systematic error
b
Unstable blanks and calibration error
a. Random error
b. Systematic error
b
Dirty glassware, sampling error
a. Random error
b. Systematic error
a
Improper mixing of sample and reagent
a. Random error
b. Systematic error
a
Operator variability
a. Random error
b. Systematic error
a
Contaminated control
a. Random error
b. Systematic error
b
Changes in standard concentration
a. Random error
b. Systematic error
b
Gradual change in the distribution of control values such that they continue to increase or decrease over a period of 6 consecutive days
a. Shift
b. Trend
c. Outliers
b