{"id":29616,"date":"2024-06-19T10:29:18","date_gmt":"2024-06-19T10:29:18","guid":{"rendered":"https:\/\/rafinor.com\/?page_id=29616"},"modified":"2025-04-08T11:03:07","modified_gmt":"2025-04-08T11:03:07","slug":"analiza-chimica","status":"publish","type":"page","link":"https:\/\/rafinor.com\/en\/analiza-chimica\/","title":{"rendered":"Chemical analysis"},"content":{"rendered":"
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Chemical analysis<\/h1>

Gold and silver purity testing via cupellation method<\/h2>

RAFINOR uses the cupellation method, one of the most precise and respected traditional techniques for analyzing precious metals. This method, which dates back to Antiquity, was widely used by Asian civilizations as early as 3000 BC, with documented use in Mesopotamia, India, and later in ancient Greece and Rome.<\/p>

Cupellation separates gold and silver from impurities through a high-temperature heating process in a special furnace. The cupel, a porous and absorbent vessel, draws in and retains base metals such as lead, copper, or zinc, leaving behind only the noble metal in its pure form.<\/p>

Although millennia old, this technique is still used today due to its exceptional accuracy and is recognized as a benchmark standard in the refining and evaluation of precious metals.<\/p>

How does cupellation work?<\/h2>

The process begins with placing the metal sample into a cupel and inserting it into a special furnace. The base metals are oxidized and absorbed, while gold and silver remain in their pure form. This technique is standardized and used in prestigious laboratories worldwide, known for its high accuracy results.<\/p>

Advantages of the cupellation method<\/h2>