A Review of Optical Nondestructive Visual and Near-Infrared Methods for Food Quality and Safety

<table>NIR of milk (colloid) and vegetable-mix juice (suspension) measured with 4 mm physical path length. Note: the preamplifier gain used for milk was stronger than that of vegetable-mix juice due to very weak transmitted light.</table>

International Journal of Spectroscopy

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Figure 3

Figure 3: A Review of Optical Nondestructive Visual and Near-Infrared Methods for Food Quality and Safety 