US 10,539,522 B2Granted

Method for analysis of hydrocarbons in water

AssigneesThe University of Western Australia, Chevron U.S.A. Inc.

InventorsEric Freemantle May, Michael Leslie Johns, Matthew Roshan Joseph Carroll, Einar Orn Fridjonsson, Paul Louis Stanwix, Brendan Francis Graham, Christopher John Kalli, Paul Steven Hofman

Life of this patent

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Abstract

A method for analysis of hydrocarbons in water, the method comprising the steps of: extracting the hydrocarbons from a water sample; introducing the extracted hydrocarbons to a solvent system; determining the relative concentrations of the hydrocarbons in the solvent system and at least one solvent in the solvent system by 1H NMR analysis, wherein the solvent system comprises at least one solvent with a 1H NMR signal distinguishable from a 1H NMR signal of the hydrocarbons.

Claims15

Dependent claims

A method for analysis of hydrocarbons in water, the method comprising the steps of:

solid phase extraction of the hydrocarbons from a water sample;
elution of the extracted hydrocarbons with a solvent system;
and
comparing the relative intensities of at least one 1H NMR signal of the hydrocarbons and at least one 1H NMR signal of at least one solvent in the solvent system,
wherein the solvent system comprises at least two solvents, wherein the first solvent has a 1H NMR signal distinguishable from a 1H NMR signal of the hydrocarbons and the second solvent is aprotic and the solvent system contains a known amount of a proton containing solvent, and
wherein the solvent system provides a reference 1H NMR signal which facilitates a self-calibrating measurement.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/574,476Filed 16 May 2016
Priority: AU 201590177215 May 2015
Published: US 2018/0143148 A124 May 2018
Granted: 21 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G01N 24/08
Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects: by using…
G01N 33/1833
Organic contamination in water: oil in water
G01R 33/30
Details of apparatus provided for in groups G01R33/44 - G01R33/64: sample handling arrangements, e.g. sample cells, spinning mechanisms
G01R 33/46
Using nuclear magnetic resonance [NMR]: nMR spectroscopy