Molten sample preparation method of silicon-iron, silicon-calcium-barium, silicon-manganese, aluminum-iron or titanium-iron alloy sample for X-ray fluorescence spectroscopy

The invention discloses a simple, quick and more reliable molten sample preparation method capable of avoiding corroding a platinum-gold crucible. The method comprises the following steps: a. weighing right amounts of lithium tetraborate, lithium carbonate, oxidizer and sample material, and evenly mixing to obtain balls; b. putting the balls obtained in the step a into a crucible with graphite powder on the bottom, and carrying out melting preoxidation in a high-temperature furnace; taking out the crucible, and cooling to obtain the preoxidated molten balls; c. weighing a certain amount of fluxing agent, adding the fluxing agent into the platinum gold crucible, and adding releasing agent and molten balls; melting at 1100-1200 DEG C for 12-20 minutes, taking out, shaking up, and removing bubbles; and melting, taking out, shaking up, and cooling by standing to obtain the molten sheet. The invention does not need to carry out wall built-up treatment on the platinum gold crucible, simplifies the operation, and ba