The fibre drop analyser: a new multianalyser analytical instrument with applications in sugar processing and for the analysis of pure liquids

Abstract

An instrumental method for the individual, sequential or collective measurement of the physical and chemical properties of liquids is presented. A prototype of the fibre drop analyser (FDA), working at only one wavelength in the infrared, has been constructed and tested. The instrument has been used to measure individually surface tension, viscosity, refractive index and the chemical composition of the test solution. The instrument has the capability of simultaneously measuring all of these quantities in one measurement cycle and this possibility is discussed on the basis of one set of results obtained from the sugar processing industry. The instrument is also potentially capable of measuring electrochemical properties of a liquid and some preliminary results are presented. The laboratory FDA has been used to test a series of samples from a large cane sugar manufacturer's process and these measurements demonstrate that the FDA technology has the potential to be used as a remote optrode industrial process monitor for sucrose manufacture, and possibly in other industrial applications.