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Overview ISO 54321:2020 defines standardized procedures for the aqua regia digestion of solid environmental matrices - soil, treated biowaste, sludge and waste - to extract the aqua regia soluble fra…
What is ISO 54321 about? Aqua regia, the yellow-orange fuming liquid, can dissolve metals like gold and platinum. ISO 54321 specifies two methods for digestion of soil, treated biowaste, sludge and w…