Abstract: A method of estimating a parameter for fitting a multi-component Taylorgram model to Taylorgram data g(t) is disclosed. The data comprises a multi-component Taylorgram peak or front at t=tr. The method comprises: evaluating a value of an integration or differential of the data; determining the parameter, based on an analytical expression that includes the value of the integral or differential of the data, the parameter corresponding with a physical property of a sample from which the Taylorgram data was obtained.

Abstract: A method of determining a relationship between a mutual diffusion co-efficient Dm and the concentration c of a solute within a solvent. The method comprises: obtaining a Taylorgram comprising a plurality of measurements of solute concentration c; and deriving from the Taylorgram a plurality of mutual diffusion coefficient values Dm corresponding with a plurality of different concentrations c of solute in the solvent.

Abstract: A method and an apparatus for characterising a sample comprising particles is disclosed. The method comprises performing a first measurement on the sample using a first particle characterisation technique; flowing the sample from the first particle characterisation technique to a particle separating device; separating the sample with the particle separating device; and performing a second measurement on the separated sample. The apparatus is configured to perform the method, and comprises a measurement system for performing measurements according to a first particle characterisation technique and a particle separating device for separating samples comprising particles.

Abstract: This application discloses a method of using an apparatus comprising a processor to determine a diffusion coefficient (D) of a solute in a solution flowing in a capillary. The method includes obtaining a first signal comprising a plurality of measurements of solute concentration measured at a first measurement location corresponding with a first mean measurement time that is before a full dispersion condition is met; obtaining a second signal comprising a plurality of measurements of solute concentration measured at a second measurement location corresponding with a second mean measurement time that is after the first mean measurement time and before a full dispersion condition is met; calculating an actual front height ratio; a convection front height ratio; and a proportion of the solute that dispersed between the first mean measurement time and the second mean measurement time.

Abstract: A method of determining a relationship between a mutual diffusion co-efficient Dm and the concentration c of a solute within a solvent. The method comprises: obtaining a Taylorgram comprising a plurality of measurements of solute concentration c; and deriving from the Taylorgram a plurality of mutual diffusion coefficient values Dm corresponding with a plurality of different concentrations c of solute in the solvent.

Abstract: A method of estimating a parameter for fitting a multi-component Taylorgram model to Taylorgram data g(t) is disclosed. The data comprises a multi-component Taylorgram peak or front at t=tr. The method comprises: evaluating a value of an integration or differential of the data; determining the parameter, based on an analytical expression that includes the value of the integral or differential of the data, the parameter corresponding with a physical property of a sample from which the Taylorgram data was obtained.