| Parameter | Suggested Method of Analysis | Description of Method | Suggested Frequency | Use of data |
|---|---|---|---|---|
| Combined Water | Moisture Balance | Constant mass at 482oF (250oC) | Start and finish of each performance test run. | Product purity and properties |
| Carbonate | EPRI Method N1 | CO2 evolution, Ba(OH)2absorption, 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 J1 | EDTA Titration | Start and finish of each performance test run. | Check for reagent quality - Product Purity. |
| Sulfate (SO4=) | EPRI Method L2 | Wet Chemistry Method | Start and finish of each performance test run. | Product purity and properties |
| Sulfite (SO3= or CaSO3.1/2H2O) | EPRI Method M1 | Iodometric titration | Start and finish of each performance test run. | Product purity and properties |
| Inerts | EPRI Method J1 | Acid Dissolution | Start and finish of each performance test run. | Quality indicator. Important for gypsum systems. |
| Solids content | EPRI Method F1 | Gravimetric | Start and finish of each performance test run. | Check density meter and indicate problems in milling circuit |
| Particle size distribution | Light Scattering Method | Malvern | Start and finish of each performance test run. | Troubleshooting problems in milling circuit or process such as low utilization or poor gypsum quality |
