ABSTRACT
Raman hyperspectral imaging (HSI) is an emerging platform technology for analysis of food additives. The Raman effect is an important physical phenomenon that is useful for composition analysis and surface inspection. Raman spectroscopy is suitable for measuring solid, aqueous, and gaseous samples, and it can detect subtle changes of various chemicals. Raman imaging instrumentation advancements over the years have paralleled progression in Raman spectroscopy instrumentation. A Raman spectrum is generally presented as a shift in energy from that of the excitation source. Food additives are the substances not commonly regarded or used as food, but by addition affect the keeping quality, texture, consistency, taste, color, alkalinity or acidity, or to serve any other technological function in relation to food, and including processing aids. A food additive may be a single chemical substance, a manufactured chemical mixture, or a natural product. The actual and potential impurities in food additives are most likely drugs during the synthesis, purification, and storage.
