Application of Handheld NIR Spectroscopy for Detection of Adulteration in Turmeric Powder

Authentication and characterization of turmeric powder using a low-resolution handheld NIR spectroscopic platform assisted with chemometric algorithm have been discussed. NIR spectral data of pure turmeric powder and turmeric powder adulterated with varying degrees of Metanil yellow powder, Corn starch powder and, Sudan dye -IV has been analyzed. Two different spectral resolution has been considered in this study. The classification model was developed using PCADA and SIMCA to discriminate the pure turmeric samples and adulterated samples. Classification accuracy of 93 percentage and 99 percentage, respectively, was achieved using the proposed model with external validation. The proposed model can predict the pure turmeric powder with 100 percentage accuracy.