Non-specific Liquid Fingerprinting in Monitoring the Hygiene and Authenticity of Milk
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The objective of this study is to introduce the usefulness of the liquid fingerprinting technology in spotting potential health hazards in foodstuff, exemplifying milk. The presented method relies on the use of long lifetime photoluminescent europium chelate and individual cross-reactive modulators in an array form. Here, we demonstrate the potency of liquid fingerprinting technology as a fast and cost-effective tool for detection of (i) melamine at the concentration of 1 ppm and (ii) Escherichia coli and Staphylococcus aureus at the level of 1000 and 3000 bacterial cells/ml, respectively, directly from milk without any bacterial concentration methods. The commonly used methods are often limited in their generic usability due to many factors, e.g., sensitivity, cost, and time of analysis. Presented technology offers monitoring within short measurement time and without any sample pre-treatment.
KeywordsLiquid fingerprinting Milk Melamine E. coli S. aureus
This study was funded by Academy of Finland Grant: 276530.
Compliance with Ethical Standards
Conflict of Interest
Anita Rozwandowicz-Jansen declares that she has no conflict of interest. Janne Kulpakko declares that he has no conflict of interest. Pekka E. Hänninen declares that he has no conflict of interest.
This article does not contain any studies with human participants or animals performed by any of the authors.
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