Comparative Study of Heavy Metals in Dried and Fluid Milk in Peshawar by Atomic Absorption Spectrophotometry

Table 3

Correlation coefficients of the mineral elements.

		Ca	Mg	Cu	Zn	Fe	Mn	Pb	Cd	Cr	Ni
Ca	Pearson’s correlation	1	0.684**	0.502**	0.732**	0.729**	0.466**	0.767**	0.373*	0.771**	0.798**
	Sig. (2-tailed)		0.000	0.000	0.000	0.000	0.001	0.000	0.011	0.000	0.000
Mg	Pearson’s correlation	0.684**	1	0.214	0.693**	0.485**	0.266	0.657**	0.173	0.722**	0.550**
	Sig. (2-tailed)	0.000		0.153	0.000	0.001	0.074	0.000	0.250	0.000	0.000
Cu	Pearson’s correlation	0.502**	0.214	1	0.423**	0.521**	0.547**	0.469**	0.194	0.512**	0.460**
	Sig. (2-tailed)	0.000	0.153		0.003	0.000	0.000	0.001	0.195	0.000	0.001
Zn	Pearson’s correlation	0.732**	0.693**	0.423**	1	0.639**	0.267	0.670**	0.460**	0.821**	0.570**
	Sig. (2-tailed)	0.000	0.000	0.003		0.000	0.073	0.000	0.001	0.000	0.000
Fe	Pearson’s correlation	0.729**	0.485**	0.521**	0.639**	1	0.303*	0.480**	0.492**	0.681**	0.730**
	Sig. (2-tailed)	0.000	0.001	0.000	0.000		0.041	0.001	0.001	0.000	0.000
Mn	Pearson’s correlation	0.466**	0.266	0.547**	0.267	0.303*	1	0.516**	0.064	0.326*	0.378**
	Sig. (2-tailed)	0.001	0.074	0.000	0.073	0.041		0.000	0.672	0.027	0.010
Pb	Pearson’s correlation	0.767**	0.657**	0.469**	0.670**	0.480**	0.516**	1	0.257	0.729**	0.735**
	Sig. (2-tailed)	0.000	0.000	0.001	0.000	0.001	0.000		0.085	0.000	0.000
Cd	Pearson’s correlation	0.373*	0.173	0.194	0.460**	0.492**	0.064	0.257	1	0.488**	0.433**
	Sig. (2-tailed)	0.011	0.250	0.195	0.001	0.001	0.672	0.085		0.001	0.003
Cr	Pearson’s correlation	0.771**	0.722**	0.512**	0.821**	0.681**	0.326*	0.729**	0.488**	1	0.746**
	Sig. (2-tailed)	0.000	0.000	0.000	0.000	0.000	0.027	0.000	0.001		0.000
Ni	Pearson’s correlation	0.798**	0.550**	0.460**	0.570**	0.730**	0.378**	0.735**	0.433**	0.746**	1
	Sig. (2-tailed)	0.000	0.000	0.001	0.000	0.000	0.010	0.000	0.003	0.000

∗∗Correlation significant at the 0.01 level.
*Correlation significant at the 0.05 level.