|
Parameter
|
Method
|
Reproducibility
|
|---|---|---|
| Alkalinity | Gran titration | ±1.5% |
| Cl– | Titration with AgNO3 | ±0.1% |
| K+ | ICP-AES | ±0.02% |
| Mg2+ | ICP-AES | ±0.1% |
| Ca2+ | ICP-AES | ±0.2% |
| SO42– | Ion chromatography | ±0.1% |
| Si(OH)4 | Spectrophotometry | ±2 mM |
| NH4+ | Spectrophotometry | ±4 mM |
| HPO42– | Spectrophotometry | ±0.2 mM |
| Fe2+ | ICP-AES | ±2.3% |
| Mn2+ | ICP-AES | ±2.3% |
| B | ICP-AES | ±2.4% |
| Li+ | ICP-AES | ±4.4% |
| Sr2+ | ICP-AES | ±1.0% |
| Ba2+ | ICP-AES | ±1.1% |
Note: ICP-AES = inductively coupled plasma–atomic emission spectroscopy.