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    Determination of copper and other heavy metals in preserved duck eggs

    Usually preserved eggs are made from fresh duck eggs. Sodium carbonate, lime or caustic soda, accompanying with salt, tea, water are used in preparation. PONY can test heavy metals in preserved eggs including copper, lead,cadmium, inorganic arsenic, total mercury, zinc, etc.

    1.Preserved egg products
    2.Egg and egg products

    Testing standards
    Due to severe hazardof industrial-grade copper sulfate and other industrial salt, AQSIQ banned use of industrial grade copper sulfate in the processing of preserved eggs since 2009, According to the national standard of food additives (GB 2760-2014), food grade copper sulphate, as precipitator and chelating agent, is only be used for preserved eggs, not industrial grade one.

    According to the standards GB/T 5009.13-2003 and GB/T 9694-1988), we provide tests for heavy metals (copper, lead, cadmium, inorganic arsenic, total mercury, zinc, etc).