vertical glass tube used in column chromatography into which a mixture is poured in the top and washed through a stationary substance where components of the mixture are adsorbed selectively to form coloured bands
Chromatography column: this is a glass tube with the dimensions and shape shown in the accompanying sketch. The top aperture
must be capable of being sealed by a glass joint having its ground flat face pressed against the top of the column by two rubber-
covered metal clamps. The seal must be completely leaktight against an applied pressure of nitrogen or air.
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