ABSTRACT
While a large variety of samples can be conveniently and reliably analyzed by direct emission spectrographic procedures, there is always a need for analyses at lower concentration levels and for analyses in which the matrix and/or some interfering sample constituents are removed. Thus, a variety of preconcentration and/or separation methods have been utilized as integral parts of emission spectrometric analysis methods. In addition to accomplishing the required preconcentration separation, primary consideration must be given to contamination of the sample or loss of the analytical constituents of interest. The following condensed list summarizes the procedures that have been used in a general classification. For further descriptions and references to specific reports on these methods, the reader is referred to Mizuike, A., in Trace Analysis: Physical Methods, Morrison, G.H., Ed., Interscience, New York 1965 and to the references given below. If contamination and loss of analytical species are suspected, the comprehensive treatment of this topical area by Gorsuch should be consulted. Preconccntration-Separation Procedures Used for Emission Spectrometric Analyses
Amalgamation
Ashing
Wet
Dry
Chromatography
Ion exchange
Miscellaneous
Distillation
Evaporation
Vaporization
of matrix
of impurities
Electrochemical
Reduction
Electrolysis
Extraction
Liquid-liquid
Fire Assay
Magnetic Methods
Precipitation
of matrix
of impurities
coprecipitation
Zone Refining
