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US 12,625,077 B2Granted
Fluorosurfactant detection
AssigneeOhio Northern University
InventorJake R. Zimmerman
Life of this patent
Estimating the term…
Abstract
A method may comprise: exposing a substituted chromone dissolved in a solvent to a sample; taking a fluorescence measurement of the sample after exposure to the substituted chromone; and determining a presence or absence of one or more ions in the sample, a concentration of the one or more ions in the sample, or both based on the fluorescence measurement.
Claims23
A method comprising:
- exposing a substituted chromone according to Compound 1 to a sample, wherein R1 is methyl acetate, methoxy, or methyl (2,2-dimethyl) acetate, R2 is 4-methylbenzoyl, 4-methoxybenzoyl, naphthalene-1-carbonyl, naphthalene-2-carbonyl, 4-phenylbenzoyl, or a perfluoroalkyl sulfonic acid compound wherein the alkyl is C5-C12, R3 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, R4 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, R5 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, and R6a-e are any of hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl,
- taking a fluorescence measurement of the sample after exposure to the substituted chromone;
- and
- determining a presence or absence of one or more per- or polyfluoroalkyl hydrocarbons (PFAS), a concentration of the one or more PFAS in the sample, or both based on the fluorescence measurement.
1 more element
A method comprising:
- exposing a substituted chromone according to Compound 2 to a sample, wherein R1 is methyl acetate, methoxy, or methyl (2,2-dimethyl) acetate, R2 is 4-methylbenzoyl, 4-methoxybenzoyl, naphthalene-1-carbonyl, naphthalene-2-carbonyl, 4-phenylbenzoyl, or a perfluoroalkyl sulfonic acid compound wherein the alkyl is C5-C12, R3 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, R4 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, R5 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, and R6a-e are any of hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl,
- taking a fluorescence measurement of the sample after exposure to the substituted chromone;
- and
- determining a presence or absence of one or more per- or polyfluoroalkyl hydrocarbons (PFAS), a concentration of the one or more PFAS in the sample, or both based on the fluorescence measurement.
1 more element
The method of 14, wherein the one or more PFAS comprise one or more selected from the group consisting of:
- perfluorooctanoic acid, perfluoroheptanoic acid, perfluoropentanoic acid, perfluorobutyric acid, perfluoropropionic acid, perfluorobutyric sulfonic acid, perfluorooctanesulfonyl chloride, undecafluoro-2-methyl-3-oxahexanoic acid, and any combination thereof.
A method comprising:
- exposing a substituted chromone according to Compound 3 to a sample, wherein R1 is methyl acetate, methoxy, or methyl (2,2-dimethyl) acetate, R2 is 4-methylbenzoyl, 4-methoxybenzoyl, naphthalene-1-carbonyl, naphthalene-2-carbonyl, 4-phenylbenzoyl, or a perfluoroalkyl sulfonic acid compound wherein the alkyl is C5-C12, R3 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, R4 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, R5 is hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl, and R6a-e are any of hydrogen, methoxy, bromo, chloro, fluoro, methyl, ethyl, or isopropyl,
- taking a fluorescence measurement of the sample after exposure to the substituted chromone;
- and
- determining a presence or absence of one or more per- or polyfluoroalkyl hydrocarbons (PFAS), a concentration of the one or more PFAS in the sample, or both based on the fluorescence measurement.
1 more element
Dependencies are inferred from the claim text.