Simultaneous Quantification of Alcoholic Content and Acidity in Brazilian Commercial Kombuchas by FTIR Spectroscopy and Chemometric Analysis.

ABSTRACT: The growth of the global kombucha market highlights the importance of quality control in production, a crucial factor to ensure consumer safety, regulatory compliance, and product consistency. This study aimed to develop and validate rapid, direct multivariate methods based on Fourier transform infrared (FTIR) spectroscopy combined with partial least squares (PLS) regression to simultaneously quantify alcohol content and acidity. The method requires minimal sample preparation, with no need for extraction or derivatization, allowing spectral acquisition in about 30 s-ideal for high-throughput analysis and aligned with green chemistry principles. Infrared spectra were recorded in the range of 4000-650 cm⁻¹. Reference values were obtained by gas chromatography with flame ionization detection

SUBMITTER: da Silva GF 

PROVIDER: S-EPMC12319122 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature