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In analytical chemistry, sample preparation (working-up) refers to the ways in which a sample is treated prior to its analyses. Preparation is a very important step in most analytical techniques, because the techniques are often not responsive to the analyte in its in-situ form, or the results are distorted by interfering species. Sample preparation may involve dissolution, extraction, reaction with some chemical species, pulverizing, treatment with a chelating agent (e.g. EDTA), masking, filtering, dilution, sub-sampling or many other techniques. Treatment is done to prepare the sample into a form ready for analysis by specified analytical equipment. Sample preparation could involve: crushing and dissolution, chemical digestion with acid or alkali, sample extraction, sample clean up and sample pre-concentration.
References
"Sample Preparation". Retrieved 2007-11-09.
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Analytical chemistry
Instrumentation
Atomic absorption spectrometer Flame emission spectrometer Gas chromatograph High-performance liquid chromatograph Infrared spectrometer Mass spectrometer Melting point apparatus Microscope Optical spectrometer Spectrophotometer
Techniques
Calorimetry Chromatography Electroanalytical methods Gravimetric analysis Ion mobility spectrometry Mass spectrometry Spectroscopy Titration
Sampling
Coning and quartering Dilution Dissolution Filtration Masking Pulverization Sample preparation Separation process Sub-sampling
Calibration
Chemometrics Calibration curve Matrix effect Internal standard Standard addition Isotope dilution
Prominent publications
Analyst Analytica Chimica Acta Analytical and Bioanalytical Chemistry Analytical Chemistry Analytical Biochemistry
Hellenica World - Scientific Library
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