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Updated: Feb 16, 2026

Absolute Quantum Yield Measurement of Powder Samples
Published on: May 12, 2012
Cadmium and lead in cocoa powder and chocolate products in the US Market
Eileen Abt1, Jennifer Fong Sam1, Patrick Gray1
1a Center for Food Safety and Applied Nutrition , U.S. Food and Drug Administration , College Park , MD , USA.
Abstract:
Cocoa powder and chocolate products are known to sometimes contain cadmium (Cd) and lead (Pb) from environmental origins. A convenience sample of cocoa powder, dark chocolate, milk chocolate, and cocoa nib products was purchased at retail in the US and analysed using inductively coupled plasma mass spectrometry to assess Cd and Pb concentrations. Cd and Pb were evaluated in relation to the percent cocoa solids and to the reported origin of the cocoa powder and chocolate products. Cd ranged from 0.004 to 3.15 mg/kg and Pb ranged from
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