Qualitative and quantitative analysis in sandalwood oils using near infrared spectroscopy combined with chemometric techniques

► Volatile and viscous essential oils viz. sandalwood oil is classified based on qualitative differences by NIR spectroscopy. ► The techniques are applied to classify sandal oils from same species (chemotypes) but different geographical origin. ► The % level of adulterants due to underdeveloped and poor distillation methods in quality oil is detected and quantified.