GENERAL QC PROCEDURES FOR TESTING LABORATORIES (PART 2)

What and Why replicate analysis? (Multiple answers)

• Repeat the readings

• Enhance result confident

• Repetition of an experimental condition

• Detect outliers and justification: Reject or accept or retest?

Main purposes of external calibration for measuring equipment? (Multiple answers)

• To identify error from reference value

• To clean the equipment

• To repair the equipment

• To apply correction factor during measurement / testing processes

Purposes of measuring equipment intermediate checks (internal calibration)? (Multiple answers)

• To clean and repair the equipment

• To verify the stability and validity of external calibration status and its correction factor (error)

• To verify whether current correction factor still valid to continue to apply

• To verify the functionality of reference standard

What is the value of Error (E) and Correction Factor (CF)?

• E= -0.4; CF= +0.4

• E= +0.4; CF= +0.4

• E= +0.4; CF= -0.4

• E= -0.4; CF= -0.4

Purposes of Quality Control (QC) Chart? (Multiple answers)

• To monitor the trend of test result (result distributions)

• To illustrate the data collected for record purpose

• To monitor the test result obtained whether within the acceptance criteria

What is Proficiency Testing (PT)? (Multiple answers)

• Same batch of sample distributed to all participated laboratories to carry out the testing within the same period

• Result comparison within the participated laboratories

• Result evaluation whether within the satisfactory range / z-score

• Indicate laboratory's overall performance, equipment performance, test performance and personnel performance

Below which is the formula of Relative Percentage Difference (RPD) for Duplicate?

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Below which is the formula of Relative Percentage Difference (RPD) for comparison against a reference value?

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