Apparatus and method for determining analyte content in a fluid

G - Physics – 01 – N

Patent

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Details

G01N 1/34 (2006.01) G01N 21/25 (2006.01) G01N 33/18 (2006.01) G01N 21/01 (2006.01) G01N 21/35 (2006.01)

Patent

CA 2748870

An apparatus and method to determine analytes in a fluid. One aspect of the present invention is for the determination of the oil content of water using UV, near-IR, IR or Raman spectroscopy or radiometry. In certain embodiments, a solid membrane material absorbs analytes from fluid brought into contact with it. The membrane is subsequently placed in a FTIR spectrometer, which spectrometer is enabled to determine the concentration of analytes in fluid by calibration. Certain embodiments can determine the type of hydrocarbon present, and thus can differentiate Total Petroleum Hydrocarbons (TPH) from Total Oil and Grease (TOG), without any separate sample preparation.

L'invention porte sur un appareil et un procédé pour déterminer des analytes dans un fluide. L'un des aspects de la présente invention est destiné à la détermination de la teneur en huile de l'eau à l'aide de spectroscopie UV, proche IR, IR ou Raman ou de radiométrie. Dans certains modes de réalisation, une matière de membrane solide absorbe des analytes à partir du fluide amené en contact avec elle. La membrane est par la suite placée dans un spectromètre FTIR, celui-ci est activé pour déterminer la concentration d'analytes dans un fluide par étalonnage. Certains modes de réalisation permettent de déterminer le type d'hydrocarbure présent, et permettent ainsi de différencier des hydrocarbures pétroliers totaux (TPH) vis-à-vis d'une huile et graisse totale (TOG), sans préparation d'échantillon séparé.

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