Table 1.
AAS analytical conditions for determination of minerals in drinking water and mineral water samples.
| Element | Wavelength (nm) | Slit width (nm) | Nebulizer rate (mL/min) | Optimum working range (μg/mL) | Standard working range (μg/mL) | Sensitivity (μg/mL) | CRM values (mg/mL) |
|---|---|---|---|---|---|---|---|
| Na | 589.0 | 0.5 | 5.0 | 0.18–0.7 | 10–1000 | 0.004 | 14.3–61.6 |
| Mg | 285.2 | 0.5 | 5.0 | 0.1–0.4 | 10–1000 | 0.003 | 7.32–23.8 |
| K | 766.5 | 0.5 | 5.0 | 0.4–1.5 | 10–1000 | 0.008 | 0.5–9.67 |
| Ca | 422.7 | 0.5 | 5.0 | 1–4 | 10–1000 | 0.02 | 14.3–39.9 |
| Fe | 248.3 | 0.2 | 5.0 | 2–9 | 1–50 | 0.05 | 0.05–0.21 |
| Cu | 324.7 | 0.5 | 5.0 | 1–5 | 1–50 | 0.025 | — |
| Zn | 213.9 | 0.5 | 5.0 | 0.4–1.5 | 1–50 | 0.008 | — |
| Cr | 357.9 | 0.2 | 5.0 | 2–15 | 1–50 | 0.05 | — |
| Mn | 279.5 | 0.2 | 5.0 | 1–3.6 | 1–50 | 0.02 | 0.02–0.05 |
| Ni | 232.0 | 0.2 | 5.0 | 1.8–8.0 | 1–5 | 0.04 | — |
| As | 193.7 | 1.0 | 5.0 | 30–190 | 1–5 | 0.64 | — |
| Cd | 228.8 | 0.5 | 5.0 | 0.2–1.8 | 1–5 | 0.009 | — |
| Pb | 283.3 | 0.5 | 5.0 | 7.0–460 | 1–5 | 0.16 | — |
| Fl | — | — | — | — | 0.1–20.0a | — | — |
| Cl | — | — | — | — | 2.5–60.0a | — | 26.4–50.2 |
| NO3 | — | — | — | — | 0.1–25.0a | — | 25.8–50.7 |
| SO4 | — | — | — | — | 1.0–35.0a | — | 27.0–57.9 |
aConcentration of minerals in mg/L.