Food Safety Analysis of Milk and Beef in Southwestern Uganda

Table 1

Mean concentrations of heavy metals in milk and beef in Bushenyi district.

Heavy metal	Milk			Beef
	N	Mean ± SEM	95% CI: (LL, UL)	N	Mean ± SEM	95% CI: (LL, UL)
Cu	15	0.56 ± 0.07^a	0.44, 0.72	15	0.41 ± 0.06^a	0.29, 0.53
Zn	20	43.72 ± 4.17^a	34.92, 52.51	20	43.74 ± 5.20^a	32.77, 54.71
Pb	18	10.48 ± 1.82^b	6.62, 14.34	18	18.90 ± 2.40^a	13.81, 24.00
Fe	20	11.96 ± 1.00^b	9.85, 14.07	20	17.04 ± 1.15^a	14.60, 19.49
Cd	20	nd	nd	20	nd	nd

Cu = copper, Zn = zinc, Pb = lead, Fe = iron, Cd = cadmium, nd = not detected, N = number of samples analyzed, CI = confidence interval, LL = lower limit, and UL = upper limit. Tukey’s multiple comparison test with significant differences () indicated by different superscripts (a, b).