Sample Preparation for the Analysis of Wooden or Plastic Toys
Sep 09 2008
Lead is a toxic heavy metal. Approx. 90% of the incorporated lead is deposited in the bones and the teeth. Because lead is released very slowly, it will be accumulated over the time in the body. This is dangerous especially for children.
The European Norm EN 71-3 regulates the limit of lead in toys. Furthermore the US norm ASTM F 963-07 regulates the concentration of lead in paints and coatings for toys (max. 600mg/kg). An adequate sample preparation is necessary to determine if toys fulfil these norms. The first step is to separate the different parts of the sample.
For the Pre-grinding we use the Universal Cutting Mill PULVERISETTE 19 or the Power Cutting Mill PULVERISETTE 25. The main advantage of these mills is, that you can remove all grinding parts without an additional tool. This makes them very easy to clean and cross-contaminations are avoided. After an adequate sample dividing, the material is milled with the Variable Speed Rotor Mill PULVERISETTE 14 to the analysis fineness of 200-500Ã¬m.
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