Elementi | Grado microelettronico | Grado elettronico | Grado farmaceutico | Grado industriale |
Purezza (GC, % in peso) | ≥99.90 | ≥99.90 | ≥99.80 | ≥99.50 |
Acqua (K.F., wt%) | ≤0.01 | ≤0.02 | ≤0.03 | ≤0.05 |
Chroma (Hazen, APHA) | ≤5 | ≤10 | ≤20 | ≤25 |
Densità (@20ºC ,g/ml) | 1.026 ~ 1.036 | 1.026 ~ 1.036 | 1.026 ~ 1.036 | 1.026 ~ 1.036 |
Indice di rifrazione (@20ºC ) | 1.465~1.475 | 1.465~1.475 | 1.465~1.475 | 1.465~1.475 |
VALORE PH (20ºC ) 50% | 6.5 ~ 9.0 | 6.5 ~ 9.0 | 6.5 ~ 9.0 | 6.5 ~ 9.0 |
Ammina totale (50%, ppm) | ≤10 | ≤20 | ≤30 | ≤50 |
Cloruro (Cl) ppm | ≤0.1 | ≤0.25 | ≤0.5 | ≤1 |
Fosfato (PO4 ) ppm | ≤0.1 | ≤0.25 | ≤0.5 | ≤1 |
Solfato (SO4 ) ppm | ≤0.1 | ≤0.25 | ≤0.5 | ≤1 |
Nitrato (NO3 ) ppm | ≤0.01 | ≤0.25 | ≤0.5 | ≤1 |
Li, ppb | ≤10 | ≤20 | -- | -- |
Na, ppb | ≤10 | ≤20 | -- | -- |
Mg, ppb | ≤10 | ≤20 | -- | -- |
Al, ppb | ≤10 | ≤20 | -- | -- |
K , ppb | ≤10 | ≤20 | -- | -- |
CA, ppb | ≤10 | ≤20 | -- | -- |
CR, ppb | ≤10 | ≤20 | -- | -- |
Mn, ppb | ≤10 | ≤20 | -- | -- |
Fe, ppb | ≤10 | ≤20 | -- | -- |
Co, ppb | ≤10 | ≤20 | -- | -- |
Ni, ppb | ≤10 | ≤20 | -- | -- |
Cu, ppb | ≤10 | ≤20 | -- | -- |
Zn, ppb | ≤10 | ≤20 | -- | -- |
AG, ppb | ≤10 | ≤20 | -- | -- |
CD, ppb | ≤10 | ≤20 | -- | -- |
PB, ppb | ≤10 | ≤20 | -- | -- |
Ti, ppb | ≤10 | ≤20 | -- | -- |
B, ppb | ≤10 | ≤20 | -- | -- |
AS, ppb | ≤10 | ≤20 | -- | -- |
Au , ppb | ≤10 | ≤20 | -- | -- |
Hg , ppb | ≤10 | ≤20 | -- | -- |