Metrics Contract Services has invested about $200,000 to add a Thermo Scientific iCAP Q ICP-MS mass spectrometer and a Milestone UltraWAVE Single Reaction Chamber digestion vessel to its analytical lab.   The investment follows substantive changes from the U.S. Pharmacopeial Convention (USP) concerning the testing of elemental impurities. The new USP 232 and 233 guidelines, which take effect in December, require that finished drug products meet stricter minimal contamination levels for elemental...