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US 10,351,789 B2Granted
Method of improving the accuracy when quantifying fluorescence markers in fuels
AssigneeAuthentix, Inc.
InventorsJeffrey L. Conroy, Philip B. Forshee
Life of this patent
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Abstract
A method of increasing the accuracy of the quantification of an analyte in a hydrocarbon, the analyte containing a marking compound, by obtaining a first sample containing (a) the hydrocarbon and (b) the marking compound, obtaining a homogeneity inducing material, contacting the homogeneity inducing material with an aliquot of the first sample in a volumetric ratio of greater than or equal to about 5:1 to produce a second sample, and determining an amount of the marking compound in the second sample using an analytical technique based on the marking material.
Claims20
A method of quantification of an analyte in a hydrocarbon, the analyte comprising a marking compound, the method comprising:
- obtaining a first sample comprising (a) the hydrocarbon and (b) the marking compound;
- obtaining a homogeneity inducing material operable to increase the homogeneity of the first sample;
- contacting the homogeneity inducing material with an aliquot of the first sample in a volumetric ratio of greater than or equal to about 5:1 to produce a second sample;
- and
- determining an amount of the marking compound in the second sample using an analytical technique.
2 more elements
A method comprising:
- obtaining a first sample comprising (a) a hydrocarbon, (b) a marking compound, and (c) a homogeneity-varying material that reduces a signal intensity of the marking compound measured by a first of at least two differing and independent analytical techniques, wherein the first sample has a degree of homogeneity in a range of from about 0.1 to about 0.4;
- contacting a matrix comprising one or more aliphatic hydrocarbons, aromatic hydrocarbons petroleum distillates, halogenated aliphatic hydrocarbons, halogenated aromatic hydrocarbons, or a combination thereof with an aliquot of the first sample in a volumetric ratio of greater than or equal to about 5:1 to produce a second sample, wherein the second sample has a degree of homogeneity in a range of from about 0.8 to about 0.95;
- determining an amount of the marking compound in the first sample using a first of the least two differing and independent analytical techniques;
- and
- determining an amount of the marking compound in the second sample using a second of the least two differing and independent analytical techniques,
- wherein an agreement between amount of the marking compound determined by the first of the at least two differing and independent analytical techniques and the amount of the marking compound determined by the second of the at least two differing and independent analytical techniques is increased relative to a same method absent the matrix.
3 more elements
A method comprising:
- A obtaining a fuel comprising (a) a fluorescent marking compound and (b) a signal-dampening material which reduces readings obtained via a first of at least two differing and independent analytical techniques, wherein the fuel has a degree of homogeneity in a range of from about 0.1 to about 0.2;
- contacting a matrix comprising one or more aliphatic hydrocarbons, aromatic hydrocarbons, petroleum distillates, halogenated aliphatic hydrocarbons, halogenated aromatic hydrocarbons, or a combination thereof with an aliquot of the fuel in a volumetric ratio of greater than or equal to about 5:1 to produce a sample, wherein the sample has a degree of homogeneity of greater than or equal to about 0.8;
- determining an amount of the fluorescent marking compound in the sample using the first of the at least two differing and independent analytical techniques;
- and
- determining an amount of the fluorescent marking compound in another aliquot of the fuel using a second of the least two differing and independent analytical techniques,
- wherein an agreement between the amount of the fluorescent marking compound determined by the first of the at least two differing and independent analytical techniques and the amount of the fluorescent marking compound determined by the second of the at least two differing and independent analytical techniques is increased relative to a same method absent the matrix.
3 more elements
Dependencies are inferred from the claim text.