European Pharmacopoeia 2.2.5 Portable Jun 2026

provides robust, validated methods for relative density determination essential for pharmaceutical quality control. Laboratories must:

) is measured, the relative density can be calculated using the formula: european pharmacopoeia 2.2.5

A precise method for both solids and liquids. It relies on accurate weighing of a known volume of liquid compared to water. While highly accurate, it requires careful handling to avoid errors from air buoyancy. While highly accurate, it requires careful handling to

Many solvents and oils have specific density ranges that help verify their identity. The monograph states: | Problem | Possible Cause

Temperature critically affects density. The monograph states:

| Problem | Possible Cause | Solution | |---------|----------------|----------| | Non-reproducible weights | Air bubbles in pycnometer | Degas sample (ultrasonic bath) | | Drifting results | Temperature fluctuation | Check bath thermostat; insulate | | Pycnometer weight changes | Dirty or wet exterior | Use lint-free cloth; calibrate cleanliness SOP | | Digital meter error | Viscosity mismatch | Use appropriate viscosity correction factor | | Outliers with solids | Air trapped in solid pores | Vacuum degas before weighing |