Guidelines for Proper Use of Platinum Labware

By following the correct protocols for handling platinum labware, you can prevent damage and maintain the integrity of your fusion processes, ensuring accurate results and extending the lifespan of your equipment.

Key guidelines include:

· Avoid contamination during handling: Always use properly cleaned, platinum-tipped tongs when handling crucibles, dishes, or moulds.

· Ensure clean surfaces: Use platinum labware only on clean surfaces to prevent contamination from the base.

· Prevent thermal shock: Never place cold metals that expand when heated into a crucible, as this can cause cracks.

· Tempering before use: Always temper a crucible before use by heating it to around 260°C for 20 minutes and allowing it to cool gradually to evaporate moisture.

· Inspect for damage: Carefully check labware for cracks or other damage before use. Any damaged items should be recycled, and a microscope can be used to assess contaminants to prevent future occurrences.

· Be aware of substances that corrode platinum: Despite its high resistance, certain substances can corrode platinum, even at relatively low temperatures. Metals such as chromium (Cr), nickel (Ni), and zinc (Zn) react with platinum at temperatures above 1200°C, potentially causing structural damage.

· Avoid fusion samples with lead, silver, or tin content: These elements can significantly reduce the melting point of platinum crucibles due to unintended alloy formation.

· Ensure oxidising conditions: Always maintain oxidising conditions during fusion processes to prevent silicon and other elements from reacting with platinum and damaging the labware.