USP 661: Physicochemical (PE and PP) – Extraction – Nonvolatile Residue, Residue on Ignition, Heavy Metals, Buffering Capacity

USP 661: PE and PP
• Buffering Capacity for Containers – Plastics
• Colorant Extraction (PET and PETG)
• Differential Scanning Calorimetry for Plastics
• Ethylene Glycol in PET and PETG Extracts
• Extraction (10 days @ 49°C)
– 25% Alcohol – 50% Alcohol
– Purified Water – n-Heptane
• Extractions and Heavy Metals for PET and PETG
• Heavy Metals for Containers – Plastics
• Nonvolatile Residue: Containers – Plastics
• Physicochemical Test Extract – Plastics
• Plastics – Infrared Spectroscopy Identity Test
• Residue on Ignition: Containers – Plastics
• Total Terephthaloyl Moieties in PET and PETG

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