Discrimination of Free-Range and Caged Eggs by Chemometrics Analysis of the Elemental Profiles of Eggshell

Table 1

Detailed information of the free-range and caged eggs analysed.

Producing area	Batch size	Type^a
Guizhou	10	F
Guizhou	11	C
Henan	22	F
Henan	18	C
Anhui	20	F
Anhui	16	C
Jiangsu	15	F
Jiangsu	20	C
Hubei	26	F
Hubei	19	C
Guangxi	16	F
Guangxi	17	C
Hunan	18	F
Hunan	21	C

^a F = “free-range” and C = “caged”.