Volume 32, Issue 1 (January 1987)
Estimation of the Absolute Density of Glass Following the Sink/Float Technique
Following the sink/float technique for the determination of comparative density, the refractive index of a bromoform/bromobenzene mixture may be determined by means of an Abbe refractometer. Reference to a calibration curve of the density and refractive index of bromoform/bromobenzene mixtures will then permit an estimation to be made of the density of the liquid, and by extension, the glass. This represents an alternative to the pycnometer method for the determination of the absolute value of the density. An estimation of the density will permit an opinion to be reached concerning how common or unusual the sample is by reference to a scatter-gram of an extended set of glass density and refractive index data.