P17.4
Moisture Content Determination — Karl Fischer Titration and Oven Drying
Procedure 4 of 40 · Chapter 17 · §17.1.5
1 table 0 notes
Table 1
| Sample Type | Expected Moisture | Recommended Method | Precision (% RSD) | Analysis Time |
|---|---|---|---|---|
| Liquid surfactants (SLES, LABSA) | 0–70% | Karl Fischer (volumetric) | 0.5–1.0% | 5–10 min |
| Oils, nonpolar solvents | <0.5% | Karl Fischer (coulometric) | 1–2% | 5–10 min |
| Powdered builders (STPP, zeolite) | 0.5–5% | Oven drying at 105°C | 1.5–2.5% | 3–5 h |
| Solid polymers (CMC, PVP) | 3–10% | Oven drying at 105°C | 1.5–2.5% | 3–5 h |
| Enzyme granules (coated) | 3–8% | Karl Fischer (oven if KF unavailable) | 1.0–2.0% | 5–10 min / 3–5 h |
| Sodium percarbonate | 0.5–2% | Karl Fischer (vacuum oven alternative) | 0.5–1.0% | 5–10 min |