| Parameter | Suggested Method of Analysis | Description of Method | Suggested Frequency | Use of data |
|---|---|---|---|---|
| pH | EPRI Method C1 | On-site using 2-Buffer Method calibration with pH meter | Start and finish of each performance test run. | Troubleshoot pH and maintain process efficiency |
| Density | EPRI Method D2 | On-site using pre-calibrated pycnometer. | Start and finish of each performance test run. | Calibrate density meter and maintain process efficiency | Slurry suspended solids content | EPRI Method F1 | Gravimetric | Start and finish of each performance test run. | Calibrate density meter and maintain process efficiency |
| Carbonate | EPRI Method N1 | CO2 evolution, Ba(OH)2 absorption, Acid-base titration | Start and finish of each performance test run. | Measuere alkali loss in filter cake of mag-lime process; important for mag-lime or sodium systems. |
| Alkalinity | EPRI Method N3 | Titrimetric | Start and finish of each performance test run. | Measuere alkali loss in filter cake of mag-lime process; important for mag-lime or sodium systems. |
| Calcium and Magnesium | EPRI Method J3 | EDTA Titration | Start and finish of each performance test run. | To determine stoichiometry and monitor process chemistry |
| Inerts | EPRI Method J1 | Acid Dissolution | Start and finish of each performance test run. | Quality indicator. Important for gypsum systems. |
| Dissolved solids content (TDS) | EPRI Method E1 | Gravimetric | Start and finish of each performance test run. | Calibrate density meter for dissolved solids |
| Sulfate (SO4=) | EPRI Method L2 | Wet chemistry methods | Start and finish of each performance test run. | To calculate stoichiometry and monitor process chemistry. |
| Sulfite (SO3= or CaSO3.1/2H2O) | EPRI Method M1 | Iodometric titration | Start and finish of each performance test run. | To calculate stoichiometry and monitor process chemistry. |
| Lime slurry particle size distribution | EPRI Method G1 | Wet Sieve | Start and finish of each performance test run. | Troubleshooting problems in milling circuit or process such as low utilization or poor gypsum quality |
