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Metallurgy Articles

Certifying Secondary Metals: Analytical Testing for Urban Mining and Scrap Recycling

By Swathi Kodaikal | Apr 29, 2026

Unverified secondary metals carry significant contamination risks. Analytical testing can help certify scrap and e-waste for the supply chain

A lab technician (with heat-resistant gloves) near a muffle furnace. They are placing small crucibles or examining small, shiny beads of recovered gold and silver that have been separated during a fire assay (cupellation) process.

Aqua regia reacts with gold-plated contacts at different concentrations. From left: 10 K, 14K, 18K, 22K solutions of test kit acid show the contacts are between 10k and 14K.

Aqua Regia Digestion: A Key Technique in Trace Metal and Soil Analysis

Apr 16, 2025

Welcoming Chem-Bac Laboratories to the Contract Laboratory Network!

Dec 5, 2024

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