Research Article
Analysis of the Concentration of Heavy Metals in Khat Grown in Meru County and the Assessment of Their Associated Health Risks
Table 3
Calibration curves, LODs, and LOQs of the developed ICP-AES method.
| Element | Emission line (nm) | Equation | Slope | | LOD (mg/kg) | LOQ (mg/kg) |
| Cd | 226.502 | Y = 1.7402x − 371 | 1.7402 | 0.9855 | 0.979 | 2.966 | Ni | 232.003 | Y = 1.1564x + 24 | 1.1564 | 0.9994 | 0.195 | 0.296 | Pb | 217.000 | Y = 1.6231x − 199 | 1.6231 | 0.9967 | 0.072 | 0.220 | Cr | 357.869 | Y = 1.3688x − 67 | 1.3688 | 0.9953 | 0.552 | 1.673 | Fe | 238.204 | Y = 1.3819x − 74 | 1.3819 | 0.9930 | 1.193 | 3.616 | Cu | 324.752 | Y = 1.4488x − 32 | 1.4488 | 0.9958 | 0.924 | 2.801 |
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