Density of micro-quantity liquids by the method of rise of drops in immiscible liquids

The conventional methods such as specific gravity bottle method, pyknometer method, and the Westphal-balance method or the capillary tube method where accurate weighing is a problem cannot be employed when liquids are available in micro-quantities. The method described may be employed to determine the density of micro-quantity liquids (even up to 0·5µl) and it is found to be simple and rapid. The method also allows the analyst to retrieve the sample for further analysis.