Table 4.

Clusters of the main keywords obtained on the VOSviewer software.

Cluster	Number of Items	Keywords on VOSviewer Network
1	15	aptamer, aptasensor, bacteria, biogenic amines, detection, dna biosensor, electrochemical, electrochemical biosensor, electrochemical sensor, food, gold nanoparticles, histamine, immunosensor, pesticides, screen-printed electrode.
2	8	biosensors, carbon nanotubes, enzymes, nanomaterials, nanoparticles, polyphenols, sensors, and wine.
3	7	amperometric biosensor, fish freshness, hypoxanthine, immobilization, meat freshness, xanthine, and xanthine oxidase.
4	6	food analysis, food safety, foodborne pathogens, microfluidics, nanotechnology, and point-of-care.
5	6	food quality, immunoassay, meat, milk, optical biosensor, and quality control.
6	5	amperometry, electronic nose, electronic tongue, mycotoxins, and sensor arrays.
7	4	active packaging, food packaging, intelligent packaging, and smart packaging.