Transcription of Classification of Analytical Techniques
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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).
techniques are capable of detecting individual atoms or molecules in a sample! Analysis at the ppm (µg/mL) and even ppb (ng/mL) level is routine. The advantages of instrumental methods over classical methods include: 1. The ability to perform trace analysis, as we have mentioned. 2. Generally, large numbers of samples may be analyzed very ...
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