Abstract

PINARES, Rubén et al. Comparisons of the Fourier transform infrared spectroscopy (FTIR), colorimetric parameters and percentage of medullation in vicuña fibre. Rev. investig. vet. Perú [online]. 2023, vol.34, n.4, e25953.  Epub Aug 25, 2023. ISSN 1609-9117.  http://dx.doi.org/10.15381/rivep.v34i4.25953.

The aim of this research was to compare vicuña fibre by the Fourier transform infrared (FTIR) spectroscopy, determine the colorimetric parameters and the percentages of medullation in vicuña fibre from Puno and Apurímac (Peru). Luminosity (L*), colour intensity or purity (C*) and tonality (H*) were characterized by colorimetry. These parameters demonstrate a variability of colour and tonality in the vicuña fleece. The FTIR spectra in fibre from vicuñas from Puno and Apurimac overlap, confirming a similar chemical profile in the fibre structure. The percentage of total medullation is different according to the origin, where the vicuñas of the Community of Toma (Puno) have higher percentage of medulation (5.02%), while the vicuñas of the communities of Pilluni (1.65%) and Taraccasa (1.80%) of Apurimac maintain a lower percentage of medullation. Likewise, variability in the percentage of fibres with fragmented and strongly medullated mediation is observed according to the origin of the vicuñas. In conclusion, vicuñas from Puno and Apurímac show fibres with similar chemical characteristics, but with phenotypic variations in colour intensity, fibre tonality, and percentage of medullated fibres.

Keywords : vicuna; FTIR spectra; colorimetry; colour intensity; type of medullation.

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