Abstract: A method of determining the quantity of two or more species in a polydisperse sample is provided. The method comprising the steps of: performing a series of dilution steps of the polydisperse sample; adding a probe into the polydisperse sample, wherein the probe is configured to bind to two or more species to form two or more probe-target species complexes; separating two or more probe-target species complexes at each dilution step into two or more bins; determining the concentration of each separated probe-target species complex in each bin at each dilution step; and determining the quantity of each target species in the sample and/or the affinity of each target species to the probe.

Abstract: A method of determining diffusion coefficient of one or more components in a polydisperse sample is provided. The method comprising the steps of: introducing an auxiliary fluid flow into a fractionation channel; introducing the polydisperse sample comprising one or more components into the fractionation channel; allowing the sample and the auxiliary fluid to create a combined flow; fractionating the combined flow into two or more fractions by diffusive sizing; subsequently separating two or more components from each fraction by creating a distribution of the components within a separation channel; detecting a characteristic of each the two or more components in each fraction; and comparing the characteristic of each component in each fraction in order to determine the diffusion coefficient of each of the one or more components in the polydisperse sample.

Abstract: Method of tracking a plurality of objects comprising: focusing an image of the objects on an imaging element using an optical system; capturing the image of the objects using an imaging element comprising a plurality of pixels; measuring at least one characteristic of the objects from the captured image using an image processor; wherein the field of view is set be the widest field of view for which the image processor is able to measure the at least one characteristic.

Abstract: Disclosed is a system for measuring a chemical in a subsurface formation comprising housing component traversable within the well, a guide extending down the well from a fixed location being operatively connected to the housing, a radiation source, and an optical pathway between a sample and detector wherein the detector is located at the ground surface. Also disclosed is a method for reducing long distance transmission of radiation comprising placing a radiation source in a housing, placing a housing down in a well bore, lowering a spectrometer down the well bore, and controlling movement of a spectrometer by a guide wire controller at the ground surface. Further disclosed is a method of radiating a sample comprising, transmitting the radiation through at least one optical pathway, interacting a sample with the radiation, producing characteristic radiation from the sample, and transmitting by an optical pathway to a detector located in a spectrometer.

Abstract: Disclosed is a system for measuring a chemical in a subsurface formation comprising housing component traversable within the well, a guide extending down the well from a fixed location being operatively connected to the housing, a radiation source, and an optical pathway between a sample and detector wherein the detector is located at the ground surface. Also disclosed is a method for reducing long distance transmission of radiation comprising placing a radiation source in a housing, placing a housing down in a well bore, lowering a spectrometer down the well bore, and controlling movement of a spectrometer by a guide wire controller at the ground surface. Further disclosed is a method of radiating a sample comprising, transmitting the radiation through at least one optical pathway, interacting a sample with the radiation, producing characteristic radiation from the sample, and transmitting by an optical pathway to a detector located in a spectrometer.

Abstract: A well fluid sampling tool (5) having a sample chamber (315) at least partly contained within an at least partially evacuated jacket (160, 165, 170), the outermost wall (160) of the jacket (160, 165, 170) being adjacent to or forming an outermost wall of the tool (5). In such a tool (5) the evacuated jacket (160, 165, 170) acts to maintain the sample as originally retrieved, e.g. in single phase form (at original temperature).