Preparation step is used when samples do not meet the EDXRF sample criteria: a) dried at 105 °C; b) < 250 μm size powder fraction.
Methodology
10 g of sample is disintegrated in an agate dish and placed into an oven at 105 °C overnight. The sample is ground using a Spex zirconia ceramic vial grinding set in a Spex ball mixer-mill and sieved to pass 250 μm.