30 grammes of silica gel and 60 ml of water are placed in a mixer and mixed for one minute. The mixture is then poured on to 5 chromatographic plates and spread to form a layer approximately 0.250 mm thick. The plates covered with this layer are subjected for fifteen minutes to a stream of hot air and then placed in an oven where they are kept for thirty minutes at a temperature of 110 čC.
Online Language Learning Tool SkELL allows users to search for phrases in sentences, collocates and similar words. These examples have been automatically selected and may contain errors.
