Tomato Quality during Short-Term Storage Assessed by Colour and Electronic Nose

Table 1

Sensors selectivity for different gases (Reference Manual, Alpha MOS, France).

Gas/Odour description		Sensors			Applications
		P-type	T-type	LY-type
Flammable gases	Hydrocarbons	X	X		Cooking, roasting; Petrochemistry; Dairy products; Food freshness; Pet food
	Methane	X	X
	Propane/butane	X		X
	Hydrogen	X	X
Organic compounds	Aldehydes	X	X		Rancidity odour; Alcohol beverages Perfumes; Fermentation; Paints & Polymers industry (PE, PP)
	Solvents	X	X
	Alcohol	X	X	X
	Aromatic compounds (toluene, xylene)	X	X
Toxic gases	Ammonia, Amines	X	X	X	Food freshness; Environment
	Hydrogen sulphide		X	X
	Carbon monoxide			X
Oxidizing gases	Flour	X	X	X	Environment; Packaging; Trichloroanisol
	Chlorine	X	X	X
	Nitrogen oxide			X
	Ozone			X
Cooking control	General purpose	X	X		Food aroma; Natural aroma; Volatiles; Petrochemistry
	Humidity	X	X
	Combustion gas monitoring	X	X
Air quality control	General air pollution monitoring	X	X		Environment; Air quality control
	Cigarette smoke	X
	Carbon monoxide and gas monitoring	X		X