By E. Prichard
Chemists in academia and clarify terminology normal in analytical chemistry, supplying additional information than the easy definition yet now not explaining how you can make measurements. They contain definitions which are not present to assist readers of older records. Examples are supplied more often than not. The cross-referencing is considerable. dispensed within the US through Springer Verlag.
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Extra resources for Analytical Measurement Terminology: Handbook of Terms Used in Quality Assurance of Analytical Measurement
An in-house reference material is an RM prepared by an organisation solely for its own internal purposes. The values for this material may have been obtained by comparison with a CRM. 3 In-house reference material This term might be used to describe a metal alloy sample known to be inherently stable, tested for homogeneity as part of routine production quality control and analysed by both the laboratory's routine method (say, XRF) and an alternative method (say, dissolution and measurement of the solution by ICP-OES).
Similarly, false negative results show absence of the analyte when it is actually present. When there is doubt about an analytical result, it may be necessary to carry out a further test. This is termed a confirmatory analysis if it involves a different technique based on an independent principle. When performing an analysis of the sample, the choice of method will be influenced by the quantity of sample available. The following terms refer to scale of working: macro, semi-micro, micro and ultra-micro.
Is it sugar or heroin? The test may be to determine the amount of Ag per cm2 of photographic paper. Qualitative analysis is the process of determining if a particular analyte is present in a sample or the identity of the sample. Often the identification of the analyte in the matrix provides insufficient information. The analyst, as well as identifying an analyte, will be required to measure the amount of analyte present in the sample. g. analysing an insulation board to determine if it contains asbestos.