Current authentication techniques rely on chromatography, spectroscopy, and mass spectrometry, coupled with chemometrics for the analysis of data. For example, researchers Braga et al. have developed a UV-Vis spectroscopy method for the identification of fraudulent whiskies using multivariate data analysis . This technique is useful in the case of authenticating whisky as it requires only a small amount of sample, doesn't require extensive sample preparation, and can be performed on commonly used laboratory equipment.