. 2019 Jun 12;6:538–543. doi: 10.1016/j.toxrep.2019.06.007

Table 1.

Concentration of heavy metals (mg/kg) in apple samples collected from four Egyptian governorates.

Ggovernorate	Heavy metals (mg/kg) (Mean ± S.E)
Ggovernorate	Cd	Cr	Cu	Pb	Ni
Cairo	ND	ND	1.63^*±0.22^a	ND	0.36^*±0.12^a
Giza	ND	ND	0.55^*±0.14^c	ND	0.19 ± 0.06^b
Alexandria	ND	ND	0.89^*±0.28^b	ND	0.11 ± 0.03^e
El-Fayoum	ND	ND	0.14 ± 0.03^d	ND	0.34^*±0.11^a
MRL	0.05¹	0.10²	0.20²	0.10¹	0.20²
LoD	0.02	0.06	0.03	0. 1	0.1

S.E: standard error, (n=9), within each column means superscript with different letters are signiﬁcantly different at the 1% level, MRL: Maximum residue limit.

European commission 1881/2006-629/2008 [60].

WHO/FAO [42].

Samples above MRL, ND: Not detected, LoD: Limit of detection.