Performance evaluation soil samples and method of their preparation using encapsulation technology to encapsulate analytes which are introduced into a soil matrix for analysis and evaluation by analytical laboratories. Target analytes are mixed in an appropriate solvent at predetermined concentrations. The mixture is emulsified in a solution of polymeric film forming material. The emulsified solution is polymerized to form microcapsules. The microcapsules are recovered, quantitated and introduced into a soil matrix in a predetermined ratio to form soil samples with the desired analyte concentration.
CONTRACTUAL ORIGIN OF THE INVENTION
The United States Government has rights in this invention pursuant to employee/employer relationship of the inventor to the United States Department of Energy at the Radiological and Environmental Sciences Laboratory, Idaho Falls, Id.