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Which of the following is an optical chemical sensing method of freshness indication in intelligent packaging?

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in Food Packaging Technology by (63.0k points)
Which of the following is an optical chemical sensing method of freshness indication in intelligent packaging?

(a) RFID

(b) Electronic nose

(c) Vitsab Single Dot Label (TTI)

(d) 3M Monitor Mark

The question was posed to me in final exam.

My enquiry is from Intelligent Packaging Systems topic in chapter Modern Packaging Techniques of Food Packaging Technology

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Best answer
Correct answer is (b) Electronic nose

Easiest explanation: Electronic nose is a simple optical chemical sensing method (colorimetric nose) that utilises the color change taking place in an array of metalloporphyrin dyes upon ligand binding. The liganding vapors (alcohols, amines, ethers, phospines, thiols, halocarbons & ketons) can be visually identified. It is an internal indicator.

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