Objective
To accurately input brine analysis data from Inductively Coupled Plasma (ICP) measurements into OLI software, it is important to convert the elemental concentrations of Boron (B), Phosphorus (P), Sulfur (S), and Silicon (Si) into their respective aqueous species. These elements do not exist in water as pure elements; instead, they exist as dissolved ions. The conversions for these elements must be completed before entering the data into the Water Analysis objects in OLI Studio: Stream Analyzer, ScaleChem, or Flowsheet: ESP.
Water Analysis Species and Conversions
The table below outlines the conversions required for each element:
| ICP Data | Aqueous Species | Formula to Enter | Conversion |
| B, Boron | Boric Acid | H3BO3 | B (mg/L) × 5.72 = H3BO3 (mg/L) |
| Si, Silicon | Silica | SiO2 | Si (mg/L) × 2.14 = SiO2 (mg/L) |
| P, Phosphorus | Dihydrogen Phosphate | H2PO4-1 | P (mg/L) × 3.13 = H2PO4 (mg/L) |
| S, Sulfur | Sulfide or Sulfate (depending on the form) | HS-1 or SO4-2 |
|
Example Conversion:
Let’s walk through a practical example using the following ICP measurements:
- Boron: 10 mg/L
- Silicon: 15 mg/L
- Phosphorus: 8 mg/L
- Sulfur: 12 mg/L
Conversions for OLI Water/Brine Analysis Entry:
- Boron: 10 mg/L × 5.72 = 57.2 mg/L of H3BO3
- Silicon: 15 mg/L × 2.14 = 32.1 mg/L of SiO2
- Phosphorus: 8 mg/L × 3.13 = 25.04 mg/L of H2PO4-1
- Sulfur:
- For Sulfide: 12 mg/L × 1.03 = 12.36 mg/L of HS-1
- For Sulfate: 12 mg/L × 3.0 = 36 mg/L of SO4-2
Conclusion
This guide helps you ensure accurate data entry for precise water chemistry analysis in OLI software.