Preparation and Evaluation of Packed Columns

Packed columns coated with a wide variety of stationary phases are commercially available. Unlike open tubular columns they are easily prepared in the laboratory and many chromatographers prefer to prepare their own columns. Almost any liquid not restricted by its vapor pressure can be studied extending the scope of packed columns to stationary phases unavailable on open tubular columns as well as allowing gas chromatography to be used to obtain physicochemical properties of a wide range of materials evaluated as stationary phases. 

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Gas chromatographs are designed to operate at colunm inlet pressures of a few atmospheres. The column pressure drop is inversely proportional to the square of the 

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Stainless steel, nickel, or glass tubes bent into various shapes to fit the dimensions of the column oven provide the container for column packings [381]. Stainless steel 

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