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Food Analytical Methods

, Volume 11, Issue 9, pp 2419–2430 | Cite as

Cyclodextrin-Promoted Fluorescence Detection of Aromatic Toxicants and Toxicant Metabolites in Commercial Milk Products

  • Dana J. DiScenza
  • Julie Lynch
  • Molly Verderame
  • Melissa A. Smith
  • Mindy Levine
Article
  • 75 Downloads

Abstract

The detection of polycyclic aromatic hydrocarbons (PAHs) and their metabolites in food and in agricultural sources is an important research objective due to the PAHs’ known persistence, carcinogenicity, and toxicity. PAHs have been found in the milk of lactating cows and in the leaves and stems of plants grown in PAH-contaminated areas, thereby making their way into both cow milk and plant milk alternatives. Reported herein is the rapid, sensitive, and selective detection of 10 PAHs and PAH metabolites in a variety of cow milks and plant milk alternatives using fluorescence energy transfer from the PAH to a high quantum yield fluorophore, combined with subsequent array-based statistical analyses of the fluorescence emission signals. This system operates with high sensitivity (low micromolar detection limits), selectivity (100% differentiation even between structurally similar analytes), and general applicability (for both unmodified lipophilic PAHs and highly polar oxidized PAH metabolites, as well as for different cow and plant milk samples). These promising results show significant potential to be translated into solid-state devices for the rapid, sensitive, and selective detection of PAHs and their metabolites in complex, commercial food products.

Keywords

Polycyclic aromatic hydrocarbons Cyclodextrin Commercial milk Fluorescence spectroscopy 

Notes

Funding

Funding is acknowledged from the National Cancer Institute (grant number: CA185435) and from the University of Rhode Island Project Completion Grant Program.

Compliance with Ethical Standards

Conflicts of Interest

Dana J. DiScenza declares that she has no conflict of interest. Julie Lynch declares that she has no conflict of interest. Molly Verderame declares that she has no conflict of interest. Melissa A. Smith declares that she has no conflict of interest. Mindy Levine declares that she has no conflict of interest.

Ethical Approval

No human subjects were involved in this study.

Informed Consent

Not applicable.

Supplementary material

12161_2018_1228_MOESM1_ESM.docx (27.7 mb)
ESM 1 (DOCX 28384 kb)

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Authors and Affiliations

  1. 1.Department of ChemistryUniversity of Rhode IslandKingstonUSA

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