Research Article
Analysis of the Concentration of Heavy Metals in Khat Grown in Meru County and the Assessment of Their Associated Health Risks
Table 1
Instrumental parameters and operating conditions for ICP-AES.
| ICP-AES parameter | Value |
| Pressure of argon gas | 450 ± 10 kPa | Nebulizer flow | 0.90 L/min | Plasma power | 1300 W | Radio frequency generator | 1.2 kW | Pump rate | 25 rpm | Coolant flow rate | 12.00 L/min | Vacuum pressure | >10 Pa | Exposure time | 30.0 seconds | Carrier gas flow rate | 0.70 L/min | Auxiliary gas flow | 0.60 L/min | Plasma gas flow rate | 10.0 L/min |
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