Classification of Analytical Techniques

Introduction to Instrumental AnalysisClassification of Analytical TechniquesIntroductionIn quantitative chemical analysis, a sample is prepared and then analyzed to determine theconcentration of one (or more) of its components. The following figure gives a general overviewof this or instrumentalsingle- or multi-channelrelative or absoluteFigure 1: Schematic showing measurement steps involved in quantitative chemical analysis of asample. There are three ways of classifying the process, based on the technique (classical vsinstrumental), the measurement data (single-channel vs multi-channel), or on whether additionaldata is needed to estimate the analyte concentration (relative vs absolute).There are a very large number of Techniques used in chemical analysis. It can be very useful toclassify the measurement process according to a variety of criteria: by the type of Analytical technique classical or instrumental Techniques ; by the nature of the measurement data generated single-channel or multi-channeltechniques; and by the quantitation method (by which the analyte concentration is calculated) relative orabsolute 1In the next few sections, we will use these classifications to describe the characteristics of avariety of Analytical vs Instrumental TechniquesIn classical analysis, the signal depends on the chemical properties of the sample: a reagentreacts completely with the analyte, and the r

mass measurement (e.g., mass of the precipitate) and in the latter method the signal is a single voltage value. • multi-channel techniques will generate a series of numbers for a single analysis. Multi-channel techniques are characterized by the ability to obtain measurements while changing some independently controllable parameter.

Tags:

  Technique, Mass

Information

Related search queries