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Screening for Green Coffee with Sensorial Defects Due to Aging During Storage by MALDI-ToF Mass Fingerprinting

  • Jhonathan David Pazmiño-Arteaga
  • Alicia Chagolla
  • Cecilia Gallardo-Cabrera
  • Andres Felipe Ruiz-Márquez
  • América Tzitziki González-Rodríguez
  • Martín Orlando Camargo-Escalante
  • Axel Tiessen
  • Robert WinklerEmail author
Article

Abstract

The sensorial quality of coffee can be impaired by prolonged storage. Aged coffee presents an off-note taste which is called “rested coffee flavor.” This quality reduction is accompanied by changes of the lipid profiles. Therefore, we tested the suitability of MALDI-ToF mass fingerprinting to discriminate between unrested (“fresh”) and rested Colombian Arabica (Coffea arabica) coffee samples. The samples represented different varieties, geographic regions, and processing. With an optimized sample preparation and data processing protocol, we obtained informative mass profiles of coffee oil. Principal component analysis (PCA) was insufficient to classify between unrested and rested samples. Thus, we developed a Random Forest model, which demonstrated a specificity of 72% to detect rested coffee across different days of sample analysis. For individual measurement days, 85–92% specificities were obtained. The high throughput of MALDI-ToF mass fingerprinting enables the broad screening of green coffee materials for quality monitoring and shelf-life studies.

Keywords

Coffee quality Mass fingerprinting MALDI-ToF Data mining 

Notes

Acknowledgements

We thank M.Sc. Josaphat Miguel Montero Vargas, Dr. Teresa Maria Teresa Carrillo Rayas, and Maria Isabel Cristina Elizarraraz Anaya for advice and excellent technical assistance.

Funding Information

The project was funded by COLCIENCIAS and national PhD sholarships 727-2016, the CONACyT Fronteras project 2015-2/814, the bilateral grant CONACyT-DFG 2016/277850, and PlanTECC. ATGR and MOCE were supported by CONACyT postgraduate scholarships.

Compliance with Ethical Standards

Conflict of Interest

None of the authors declares a conflict of interest.

Ethical Approval

This article does not contain any studies with human participants or animals performed by any of the authors.

Informed Consent

Not applicable.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Jhonathan David Pazmiño-Arteaga
    • 1
  • Alicia Chagolla
    • 2
  • Cecilia Gallardo-Cabrera
    • 1
  • Andres Felipe Ruiz-Márquez
    • 3
  • América Tzitziki González-Rodríguez
    • 2
  • Martín Orlando Camargo-Escalante
    • 2
  • Axel Tiessen
    • 2
  • Robert Winkler
    • 2
    • 4
    Email author
  1. 1.Facultad de Ciencias Farmacéuticas y Alimentarias, Grupo de Estabilidad de Medicamentos, Cosméticos y Alimentos GEMCAUniversidad de AntioquiaMedellín-AntioquiaColombia
  2. 2.CINVESTAV IrapuatoIrapuato Gto.Mexico
  3. 3.Grupo de Investigación La SaladaServicio Nacional de Aprendizaje SENACaldas-AntioquiaColombia
  4. 4.Mass Spectrometry GroupMax Planck Institute for Chemical EcologyJenaGermany

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