Research Article
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 |
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