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In-Plant Assessment of Peruvian Pisco Distillates Using Infrared Sensing Technologies.

Yalan Wu1, Beatriz Hatta-Sakoda2, Victor Hugo Toledo-Herrera2

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Summary
This summary is machine-generated.

Portable Fourier transform infrared spectroscopy (FT-IR) effectively screens Pisco quality by analyzing alcohol fingerprints. This method allows for precise distillation cuts and consistent product quality in distilleries.

Keywords:
FT-IRPeruvian Piscodistillation fractionquality control

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Chemical Engineering

Background:

  • Pisco quality control traditionally relies on empirical methods.
  • Accurate monitoring of distillation fractions is crucial for product consistency.
  • Gas chromatography is a standard but time-consuming quality assessment technique.

Purpose of the Study:

  • To develop and validate a novel, portable Fourier transform infrared spectroscopy (FT-IR) method for Pisco quality screening.
  • To differentiate Pisco distillate fractions using FT-IR.
  • To quantify key quality components in Pisco using FT-IR.

Main Methods:

  • Utilized a portable FT-IR spectrometer with an attenuated total reflectance accessory.
  • Analyzed 188 Pisco samples from Peruvian distilleries.
  • Employed partial least squares regression for quantitative analysis.

Main Results:

  • FT-IR successfully discriminated between Pisco head, body, and tail fractions based on alcohol fingerprints (3091-2660 cm⁻¹ and 1190-821 cm⁻¹).
  • Strong correlations (Rpre = 0.93-1.00) were observed between FT-IR predictions and actual values for key components.
  • Low errors of prediction (RMSEP) were achieved in quantifying ethanol, methanol, acetaldehyde, acetic acid, furfural, and titratable acidity.

Conclusions:

  • Portable FT-IR offers a scalable and efficient alternative to conventional Pisco quality assessment methods.
  • This technology enables in-line monitoring for precise distillation cuts and cost reduction.
  • This study represents the first report of portable FT-IR for real-time quality monitoring in spirit distilleries.