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The establishment of EVISA is funded by the EU through the Fifth Framework Programme (G7RT- CT- 2002- 05112).

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EVISA is providing a list of terms used in the area of speciation and fractionation analysis. Since speciation analysis is a field of analytical chemistry that is specified by a pronounced interdisciplinary cooperation between different sciences such as biochemistry, medicine, biology, environmental sciences, nutritional sciences and material sciences its terminology is a complex mixture of terms used in all these.

You may search for a term or browse the glossary alphabetically.

(In case that you cannot find the term you may consult more special glossaries or handbooks about nomenclature. For more details please consult EVISA's Link pages related to terminology,



quadrupole mass analyzer
Arrangements of four electrostatic rods (Quad) in which ions with a desired quotient mass/ charge are made to describe a stable path under the effect of a static and a high- frequency electric quadrupole field applied to the rods, and are then detected. Ions with a different mass/ charge are separated from the detected ions because of their unstable paths deflecting them from the axis towards the detector.

qualitative analysis
Chemical analysis designed to identify the components of a substance or mixture.

quality assessment
procedure for determining the quality of laboratory measurements by use of data from internal and external quality control measures.

quality assurance
a definitive plan for laboratory operation that specifies the measures used to produce data of known precision and bias.

quality control
set of measures within a sample analysis methodology to assure that the process is in control.

quality control chart
A graphical record of the monitoring of control samples which helps to determine the reliability of the results

quality control sample
A quality control sample is a sample of known composition, very similar in terms of matrix and analyte concentration to the samples to be analysed. It is analysed along with the samples. The results are often plotted on a chart to monitor any significant drift in the performance of the analytical method - such a chart is known as a control chart . A quality control sample, often known as a QC sample or check sample may be an in-house material prepared for this purpose or it may be from a previously analysed batch of samples.

quality management
All activities of the overall management function that determine quality policy objectives and responsibilities; and implement them by means such as quality planning, quality processes, quality control, quality assessment, and quality improvement within the quality system. [CLSI, ISO]

quality system
A quality system is a set of procedures and responsibilities which a company or organisation has in place to ensure that staff have the facilities and resources to carry out measurements that will satisfy their clients. The quality system is a combination of quality management, quality assurance and quality control.

quantitative analysis
Chemical analysis which is normally taken to mean the numerical measurement of one or more analytes to the required level of confidence.

quantum efficiency
Characteristic of a light-sensitive detector that specifies what percent of the incoming light is actually transformed in an electrical signal (charge) in the detector

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