Can you recommend a technique for finding the Free-Carbon content in Boron Carbide (B4C)?

09 September 2011 1 7K Report

I am looking to determine Free Carbon and Combined Carbon content in Boron Carbide

I think it is relatively hard task, the free carbon, especially those graphatic carbon can hardly be removed or to be determined, while the ill crystallized boron carbide can be easily oxidized.

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