A Combination of UV-Vis Spectroscopy and Chemometrics for Detection of Sappanwood (Caesalpinia sappan) Adulteration from Three Dyes

Sappan wood (Caesalpinia sappan) is very well known as a natural dye for traditional food and beverage in many countries. Recently, there are reports of sappan adulteration by adding synthetic or dyes to obtain quality color better appearance. In this study, UV-Vis absorption spectra coupled with chemometrics were used develop rapid detection raw material (authentication) from three dyes, i.e., sudan III, commercial textile red yeast rice. Absorption 13 adulterated the two different concentrations which resulted about 78 samples measured spectrophotometer at wavelength range 200-800 nm. A principal component analysis followed discriminant was construct model authentication study. The combination both methods successfully classified non-adulterated dyes. Cross-validation results rice 94.12%, 92.16% correctly into their groups, respectively.