Copy of `NMS - Chemical and biological services terms`

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NMS - Chemical and biological services terms
Category: Sciences > Analysis
Date & country: 11/12/2007, UK
Words: 17


Accreditation
Third-party statement based on a decision following review that competence to carry out a task has been demonstrated.

Accuracy
Closeness of agreement between a single test result or measurement result and the true value.

Analyte
Any substance whose identity or concentration is to be determined.

Bias
The difference between the mean value of a set of test results or measurement results and the true value.

Control charts
Routine charting of data obtained from the analysis of quality control materials to check that the results lie within predetermined limits.

Error
The difference between a result of a measurement and the true value of the measurand.

Fitness for purpose
A formal process of assessing that a method is suitable for a given application.

Limit of detection
The lowest amount of an analyte that can be measured with reasonable statistical certainty.

Measurand
A particular quantity subject to measurement.

Measurement uncertainty
A range of values within which the true value of the measurement is expected to lie with a given level of confidence.

Precision
The closeness of agreement between independent test results obtained under stipulated conditions. A precision estimate is a statistical measure of the spread of the results obtained from a series of replicate measurements.

Proficiency Testing
Determination of laboratory testing performance by means of interlaboratory comparisons.

Quality Assurance
Part of quality management focused on providing confidence that quality requirements will be fulfilled. It is all the activities undertaken by an organisation to ensure a defined standard of quality for its goods or services.

Quality control
Part of quality management focused on fulfilling quality requirements.

Quality control chart
Routine charting of data obtained from the analysis of quality control materials to check that the results lie within predetermined limits.

Trace analysis
Analysis of samples containing a low concentration of the anlayte(s) of interest â€` typically less than 100 mg kg-1. Note that trace analysis is also used to describe the analysis of a very small quantity of sample material (especially in forensic analysis).

Validation
Confirmation by examination and provision of objective evidence that the particular requirements for a specified intended use are fulfilled.