| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method of accurately determining the quantity of contained zirconium, by certainly sample-decomposing quartz and converting it into a solution state.SOLUTION: In the analytical method of zirconium in quartz, quartz glass or quartz powder for manufacturing quartz glass is heated and molten with a hydrofluoric acid or a mixture of the hydrofluoric acid and sulfuric acid required for melting all of the quartz glass or quartz powder, and then they are evaporated and dried. An alkaline carbonate metal salt and boric acid are added to the obtained dried material and heated and molten. The obtained molten material is dissolved in an aqueous inorganic acid solution, and the zirconium in the solution is quantitatively analyzed.</p> |
