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Schwermetalle in Lebensmitteln. 2. Mitteilung: Über den Gehalt an Blei in Rohkakao und in Kakao-Halb- und Fertigprodukten

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49 samples of raw cocoa of 22 different origins together with 59 samples of commercially procured bar chocolate, chocolate candy, cocoa powder and instant powder were investigated with regard to their lead content. Samples were incinerated in a teflon-lined autoclave by means of flameless AAS. The average content in the samples we investigated is below 0.34 mg/kg. Average lead contents in milk chocolates with and without nuts were between 0.11 and 0.17 mg/kg, and it should be mentioned that milk chocolates account for about 85% of the entire chocolate and processed-chocolate production. Semi-sweet chocolate was found to have a lead content of 0.14 mg/kg, bitter-sweet chocolate one of 0.28 mg/kg. Cocoa powder and instant drinks contain 0.2 and 0.13 mg of lead per kg, respectively, based on the powder. Chocolate candy and bar chocolates with additions and fillings contain 0.09 and 0.07 mg of lead per kg, respectively.

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