Forensic Analysis - QA6

Flashcards covering key terms and concepts from the Analytical Chemistry lecture on Laboratory Proficiency.

Shewhart Chart

A control chart used to evaluate the stability of a process by measuring ongoing bias.

Warning Limits

The limits set at ±2 standard deviations from the target value; indicates potential issues.

Action Limits

The limits set at ±3 standard deviations from the target value; any result beyond these indicates an out-of-control process.

LRM (Long-term Routine Monitoring)

Data used for quality control to assess stability of measurements over time.

Bias Evaluation

The process of determining if there is a consistent deviation from the target value in analytical measurements.

Mean

The average value calculated from a set of measurements.

Standard Deviation (SD)

A measure of the amount of variation or dispersion in a set of values.

Phosphate analysis

The analysis of phosphate concentration, often measured in nmol/dm³.

Batch Rejection Criteria

Standards for determining whether a batch of analysis is considered out-of-control and should be rejected.

Moving Average Chart

A chart that shows the average of a set of values over a specified number of consecutive data points.

ISO 7870-2: 2013

An international standard that outlines criteria for control charts, including rejection criteria.

Control Chart

A graphical representation used to monitor the quality of a process over time.

QC (Quality Control)

A system of maintaining standards in manufactured products by testing a sample of the output.