Add 3-4ml saturated (NH4)gC204 to the sample and stir. Digest the sample in a hot water bath for 5 minutes to coagulate the precipitate. Centrifuge the sample and discard the supernate. Filter the sample into a tarred filter dise (Glass fiber or Whatman42). Wash the sample once with deionized water and once with ethanol. Dry and weigh the sample and submit it for counting. A completed EIC 99sr data sheet must accompany the sample. A-15-2