Table 9.
Physical comparison of the digestion methods
| Parameters | Wet Acid (HNO3) | Wet Acid (HNO3 & H2O2) | Dry Ash |
|---|---|---|---|
| Estimation of reagent cost per sample | < MYR 0.50 | < MYR 1.00 | < MYR 0.50 |
| Turnaround time per batch | One day | Two days | One day |
| Risk of contamination | High | Low | High |
| Element losses | Volatile elements is at risk of loss | Low risk of losses | Volatile elements is at risk of loss |
| Supervision | Requires supervision | Does not requires supervision | Requires supervision |
| Safety risks | Hazardous fumes, corrosive | Hazardous fumes, corrosive | Hazardous fumes, corrosive |
| Instrument requirement | Requires block digester | Requires drying oven | Requires electrical furnace |
Abbreviation: MYR= Malaysia Ringgit.