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Microingredient containing tracer

  • US 4,654,165 A
  • Filed: 04/16/1985
  • Issued: 03/31/1987
  • Est. Priority Date: 04/16/1985
  • Status: Expired due to Term
First Claim
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1. A tracer particle for determining the concentration of a microingredient in a bulk material, said tracer particle comprising a finely divided ferromagnetic particulate material approximately 90% of which is approximately 325 mesh or smaller, a microingredient and a binder wherein said microingredient and ferromagnetic material are entrapped in said binder and wherein said tracer particle is approximately 35 to 80 mesh in size.

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