Automated fingerprint methods and chemistry for product authentication and monitoring

• US 5,753,511 A
• Filed: 05/06/1996
• Issued: 05/19/1998
• Est. Priority Date: 05/06/1996
• Status: Expired due to Term

• Current Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Original Assignee: Verification Technologies, Inc. (Sun Chemical, Inc.)
• Inventors: Selinfreund, Richard
• Primary Examiner(s): SNAY, JEFFREY R
• Application Number:
  US08/642,927
• Time in Patent Office: 743 Days
• Field of Search: 436/56, 436/20, 436/24, 436/22, 436/23, 436/2, 436/172
• US Class Current: 436/20
• CPC Class Codes: G01N 21/6428 Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" in vivo A61B5/00; immunoassay G01N33/53
• CPC Class Codes: G07F 7/086 by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer for security documents G07D7/00; for the reading of record-carriers in general G06K7/00; for the design of coded credit-cards G06K19/10

Abstract

Highly efficient, low cost, methods and compounds to determine product authenticity, tampering, manufacturing compliance are provided. The methods and chemicals defined are capable of measuring the relative amounts of key materials in these products. The compounds are light-emitting and interact with key elements in products like, neutral spirits, vodka, tequila, soft drinks and infant formulas. After the interactions are complete, methods are employed to determine resulting key components by light emission.

Claims

1. A method for determining relatedness of a sample to a standard know to be authentic or known to have at least one selected characteristic of authentic material, the method comprising:

a. combining a sample with at least one light-emissive compound to form a sample mixture;

b. irradiating the sample mixture with an irradiating wavelength of light;

c. monitoring at least one emitted wavelength of light, generated by the sample mixture in response to the irradiating wavelength of light, to establish a sample fingerprint;

d. providing a standard fingerprint characteristic of a standard mixture, the standard mixture comprising the standard and the light-emissive compound and the standard fingerprint being generated by irradiating the standard mixture with the irradiating wavelength of light and monitoring the at least one emitted wavelength of light, generated by the standard mixture, in response thereto, wherein the light-emissive compound is selected so as to interact with the standard to provide a characteristic light emission; and

e. comparing the sample fingerprint with the standard fingerprint to determine whether the sample is authentic.

2. The method of claim 1 in which the light-emissive compound is added to the sample by an automated pipette.

3. The method of claim 1, wherein the sample mixture is dispensed by an automated pipette in a multiwell plate.

4. The method of claim 1 in which the light-emissive compound is fluorescent, phosphorescent, or luminescent.

5. The method of claim 1 in which the light-emissive compound reacts with components of the sample or the standard or both to yield at least one fluorescent, phosphorescent, or luminescent component.

6. The method of claim 1 in which steps (b)-(c) are repeated at least three times using the same light-emissive emissive compounds and the same irradiating and emission wavelengths to establish a fingerprint emission profile for the sample.

7. The method of claim 1, in which the standard is a caffeine-containing beverage, and the light-emissive compound is selected from the group consisting of 5-(2-carbohydrazinomethylthioacetyl)aminofluorescein, 5-(4,6-dichlorotriazinyl)aminofluorescein, Fluo-3 pentaammonium salt, 4-aminofluorescein, 5-aminofluorescein, sulfite blue coumarin, courmarin diacid cryptand (CD222), and Eosin Y.

8. The method of claim 1, in which the standard is an infant formula, and the light-emissive compound is selected from the group consisting of 5-(2-carbohydrazinomethylthioacetyl)aminofluorescein, 5-(4,6-dichlorotriazinyl)aminofluorescein, Fluo-3 pentaammonium salt, and BTC-5N.

9. The method of claim 1, in which the standard contains corn syrup, and the light-emissive compound is selected from the group consisting of 5-(2-carbohydrazinomethylthioacetyl)aminofluorescein, 5-(4,6-dichlorotriazinyl)aminofluorescein, Fluo-3 pentaammonium salt, 4-aminofluorescein, 5-aminofluorescein, sulfite blue coumarin, courmarin diacid cryptand (CD222), and Eosin Y.

10. The method of claim 1, in which the standard is an ethanol-containing beverage and the light-emissive compound is selected from the group consisting of 5-(2-carbohydrazinomethylthioacetyl)aminofluorescein, 5-(4,6-dichlorotriazozinyl)aminofluorescein, Fluo-3 pentaamonium salt, proflavine hemisulfate, tetra(tetramethylammonium) salt, acridine orange hydrochloride hydrate, BTC-5N, acriflavine, 4-aminofluorescein, and 5-aminofluorescien.

11. The method of claim 1, in which the standard is an aqueous mixture, and the light-emissive compound is a compound that interacts or reacts with heavy metals, the light-emissive compound being selected from the group consisting of Fluo-3 pentaammonium salt, or BTC-5N.

12. The method according to claim 1, further comprising the steps of:

providing a mixture comprising ethanol and water; and

evaporating substantially all the ethanol from the mixture to form the standard.

13. The method of claim 1, wherein the standard, the sample, or both inherently include a fluorescent, phosphorescent, or luminescent compound.

14. The method of claim 13 in which the compound is caffeine.

15. The method of claim 1 comprising performing steps (b)-(d) at least two times.

16. The method of claim 15, in which steps (b)-(c) are performed using different light-emissive compounds.

17. The method of claim 15, in which different irradiating and emission wavelengths are monitored in each performed step.

18. The method according to claim 1, further comprising the steps of:

providing a mixture comprising ethanol and water; and

evaporating substantially all the ethanol from the mixture to form the sample.

19. The method according to claim 18, further comprising the steps of:

providing a mixture comprising ethanol and water; and

evaporating substantially all the ethanol from the mixture to form the standard.

20. The method of claim 1 further comprising:

providing a background control mixture which comprises the light-emissive compound without the sample or the standard;

irradiating the background control mixture with the irradiating wavelength and monitoring the emitted wavelength in response thereto, to establish background emission; and

determining the fingerprint of the sample based on at least one difference between the emission of the control mixture and the emission of the sample mixture.

21. The method of claim 20, in which

the standard is a composition having a predetermined relative amount of a component characteristic of authentic material,

the sample fingerprint is generated based on a first change in emission, determined by comparing the background emission and the emission from the sample mixture, and the standard fingerprint is generated based on a second change in emission, determined by comparing the background emission and the standard emission, and

the comparing step comprises quantifying the relative amount of the component in the sample by comparing the first change in emission to the second change in emission.

22. The method of claim 1 or claim 20, in which

the standard is a composition having a predetermined relative amount of a component characteristic of authentic material, and

the comparing step comprises quantifying the relative amounts of the component in the sample.

29. The method of claim 1 or claim 23 wherein the method is used to determine product authenticity, product tampering, or product manufacturing compliance.

30. The method of claim 1 or claim 18 wherein the sample is a perfume, fragrance, flavor, food, or beverage product.

23. A method for determining relatedness of a first sample to a second sample, the method comprising:

a. combining a first sample with at least one light-emissive compound to form a first sample mixture;

b. irradiating the first sample mixture with an irradiating wavelength of light;

c. monitoring at least one emitted wavelength of light generated by the first sample mixture in response to the irradiating wavelength of light, to establish a first sample mixture fingerprint characteristic of the first sample mixture;

d. providing a second sample fingerprint characteristic of a second sample mixture, the second sample mixture comprising the second sample and the light-emissive compound; and

the second sample fingerprint being generated by irradiating the second sample mixture with the irradiating wavelength of light and monitoring the at least one emitted wavelength generated by the second sample mixture in response thereto wherein the light-emissive compound is as interact with the second sample mixture to provide a characteristic light emission; and

e. comparing the first sample fingerprint with the second sample fingerprint to determine relatedness of the two samples.

24. The method of claim 23, in which the first sample is identified as a specific product or as part of a homogeneous lot of a product by comparing the first sample mixture fingerprint to a library of fingerprint emission profiles of samples whose product composition or lot number are known.

25. The method of claim 23, further comprising providing an additional fingerprint emission profile for each of at least two additional samples and comparing the first sample mixture fingerprint to each of the additional fingerprint emission profiles.

26. The method according to claim 23, further comprising the steps of:

providing a mixture comprising ethanol and water; and

evaporating substantially all the ethanol from the mixture to form the second sample.

27. The method according to claim 23, further comprising the steps of:

providing a mixture comprising ethanol and water; and

evaporating substantially all the ethanol from the mixture to form the first sample.

28. The method according to claim 27, further comprising the steps of:

providing a mixture comprising ethanol and water; and

evaporating substantially all the ethanol from the mixture to form the second sample.