Table 2.

Comparison of As and Hg residue (µg kg⁻¹) in hen eggs (two seasons)

Heavy metals	Min	Max	Mean ± SE
AS
Winter	0.10	1.50	0.52 ± 0.050
Summer	0.00	7.50	1.07 ± 0.557
Hga
Winter	0.00	0.50	0.26 ± 0.021
Summer	0.10	0.10	0.10 ± 0.00

^aDifferences in As between winter and summer were not significant with Paired t-test (p = 0.451) but were significant in Hg (p < 0.001)