Título:
Rapid detection of black pepper adulteration withendogenous and exogenous materials : assessment of benchtop and handheld infrared spectrometers
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Autor:
Rentz, Paul
Mihailova, Alina
Heinzen, Horacio
Bergaentzlé, Martine
Ruhland, Elisa
Islam, Marivil D.
Hamed, Islam
Vlachou, Christina
Kelly, Simon
Ennahar, Said
Werner, Dalal
Mihailova, Alina
Heinzen, Horacio
Bergaentzlé, Martine
Ruhland, Elisa
Islam, Marivil D.
Hamed, Islam
Vlachou, Christina
Kelly, Simon
Ennahar, Said
Werner, Dalal
Tutor:
Tipo de documento:
Artículo
Editor:
Palabras clave:
Pimienta negra
Autenticidad
Adulteración
Espectroscopía infrarroja
Quimiometría
Autenticidad
Adulteración
Espectroscopía infrarroja
Quimiometría
Descriptores:
Año de publicación:
2026
Contenido:
Resumen:
Black pepper is the most widely used spice crop globally and has significant economic value,
making it a target for economically motivated adulteration. A wide range of organic and
inorganic bulking materials has been used as adulterants in black pepper. Development of
rapid non-targeted screening methods for use at different stages of the black pepper supply
chain is extremely important for the identification and prevention of evolving fraudulent
practices. This study has assessed the potential of benchtop Fourier Transform infrared
with attenuated total reflectance (FTIR-ATR), benchtop Fourier Transform near-infrared
(FT-NIR), and two handheld NIR spectrometers, coupled with chemometrics, for the
discrimination of black pepper (Piper nigrum), pepper from other species and genera (non-
Piper nigrum) and a broad range (n = 27) of endogenous and exogenous adulterants. Spiked
samples were prepared to imitate pepper adulteration with seven different adulterants at
five levels of adulteration (5%, 25%, 50%, 75%, 95% w/w). Orthogonal partial least squares
discriminant analysis (OPLS-DA) achieved 100% total prediction accuracy for both FTIRATR
and FT-NIR in differentiating authentic Piper nigrum and adulterant samples. The
handheld microNIR 1700ES resulted in a 91.30% correct classification rate, while the SCiO
model achieved 86.96% prediction accuracy. Detection of black pepper adulteration with
multiple adulterants was performed using data-driven soft independent modelling of class
analogy (DD-SIMCA). The highest performance of the DD-SIMCA model was achieved
by FTIR-ATR (100% sensitivity and 100% specificity) followed by FT-NIR (98% sensitivity
and 99% specificity). The handheld microNIR 1700ES resulted in 95% sensitivity and 90%
specificity. This study demonstrated that FTIR-ATR and FT-NIR, coupled with DD-SIMCA,
can effectively detect black pepper adulteration with multiple endogenous and exogenous
adulterants. The handheld NIR (microNIR1700ES) clearly demonstrated the potential for
rapid and effective verification of Piper nigrum authenticity outside the laboratory.
Descripción:
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MDPI
EN:
Foods, v. 15, n°4, 2026. -- e754.
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Citación:
Rentz, P., Mihailova, A., Heinzen, H. y otros. "Rapid detection of black pepper adulteration withendogenous and exogenous materials : assessment of benchtop and handheld infrared spectrometers". Foods [en línea] v. 15, n°4, 2026. -- e754. 19 p.
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Licencia:
Licencia Creative Commons Atribución (CC - By 4.0)
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| Texto completo.pdf | — | 3.2 MB | Adobe PDF |