Analysis of the Concentration of Heavy Metals in Khat Grown in Meru County and the Assessment of Their Associated Health Risks

Table 7

The principal component analysis of heavy metals in Meru khat samples.

Metals	Principal components matrix				Metals		Rotated components matrix
	PC1	PC2		PC3			PC1	PC2		PC3
Ni	0.91	−0.16		0.21	Ni		0.90	−0.30		−0.46
Cr	0.88	0.03		0.03	Cr		0.83	−0.20		0.19
Fe	0.65	0.57		0.41	Fe		0.82	0.48		0.07
Pb	−0.41	0.78		0.35	Pb		−0.16	0.93		−0.02
Cu	0.01	0.75		−0.49	Cd		−0.19	0.30		−0.81
Cd	−0.44	−0.14		0.75	Cu		−0.47	0.45		0.77
Component	Initial eigenvalues
	Total				Variance (%)			Cumulative (%)
1	2.37				39.55			39.55
2	1.53				25.44			64.98
3	1.13				18.83			83.81
4	0.56				9.40			93.21
5	0.27				4.51			97.72
6	0.14				2.28			100.00
Component	Extraction sums of squared loadings				Rotation sums of squared loadings
	Total	Variance (%)	Cumulative (%)		Component	Total		Variance (%)	Cumulative (%)
1	2.37	39.55	39.55		1	2.23		37.08	37.08
2	1.53	25.44	64.98		2	1.52		25.36	62.44
3	1.13	18.83	83.81		3	1.28		21.37	83.81