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Related Concept Videos

Qualitative Analysis03:46

Qualitative Analysis

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For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
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Composition of Polyprotic Acid Solutions as a Function of pH01:19

Composition of Polyprotic Acid Solutions as a Function of pH

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Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
A graph with the alpha values is plotted against the volume of...
484
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  3. Research Domains
  5. Agricultural, Veterinary And Food Sciences
  7. Crop And Pasture Production
  9. Crop And Pasture Biochemistry And Physiology
  11. Alkaloid Profile Of Italian Alpine Milk.
  1. Home
  3. Research Domains
  5. Agricultural, Veterinary And Food Sciences
  7. Crop And Pasture Production
  9. Crop And Pasture Biochemistry And Physiology
  11. Alkaloid Profile Of Italian Alpine Milk.

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Alkaloid profile of Italian alpine milk.

Tiziana Nardin1, Edi Piasentier2, Alberto Romanzin2

  • 1Centro Trasferimento Tecnologico, Fondazione E. Mach, San Michele all'Adige, Italia.

Journal of Food Science
|February 4, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Alkaloid transfer from alpine herbs to milk is minimal, posing no health risk. However, these alkaloid profiles can serve as unique markers for tracing the geographic origin of mountain dairy products.

Keywords:
alkaloidsalpinemilk

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Area of Science:

  • Agricultural Science
  • Food Chemistry
  • Analytical Chemistry

Background:

  • Alkaloids in animal feed can impact milk composition and safety.
  • Geographic traceability of food products is increasingly important for consumers and industry.

Purpose of the Study:

  • To investigate alkaloid profiles in alpine milk and associated herbage.
  • To assess the transfer rate of different alkaloid classes from pasture to milk.
  • To evaluate the potential of alkaloid profiles as markers for geographic traceability of alpine milk.

Main Methods:

  • Collection of daily milk samples from cows on two distinct alpine pastures.
  • Collection of alpine herbs selected by grazing cows.
  • Analysis of milk and herbage samples using liquid chromatography coupled with high-resolution mass spectrometry (LC-HRMS).
  • Statistical analysis, including partial least squares-discriminant analysis (PLS-DA), to differentiate milk samples based on alkaloid profiles.

    • Main Results:

    • Identification of 41 alkaloids and putatative identification of 116 others in milk and herbage.
    • Quantification of alkaloid transfer from herbs to milk: 0.4% for pyrrolizidine, 2.7% for indole, and 12% for steroidal alkaloids.
    • A PLS-DA model successfully reclassified 67% of milk samples according to their pasture of origin based on alkaloid profiles.

    Conclusions:

    • The transfer of alkaloids from alpine herbs to milk is minimal, indicating a positive health aspect for consumers.
    • Alkaloid profiles in alpine milk show potential as reliable markers for verifying the geographic origin of dairy products.
    • This research supports the enhancement of mountain pasture product authenticity and fraud prevention.