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试样用盐酸在电热板上低温溶解约30min后,补加盐酸-硝酸-氢氟酸-高氯酸-硫酸加热溶解完全,蒸发至近干。用盐酸溶解盐类至溶液清亮,冷却。定容到100mL容量瓶中,在波长336.1nm用ICP-AES测定矿石中的钛量。方法检出限为3.3μg/g,经国家一级标准物质分析验证,结果与标准值相符。对一级标准物质GBW07105测定12次,方法精密度(RSD)为1.93%,该方法操作简单,适用于批量钛铁矿、钒钛磁铁矿石中钛的测定。
Hydrochloric acid samples were dissolved in hydrochloric acid at low temperature for about 30min, add hydrochloric acid - nitric acid - hydrofluoric acid - perchloric acid - sulfuric acid heating to dissolve completely, evaporated to near dryness. Dissolved salt with hydrochloric acid to the solution clear, cooled. To a 100mL volumetric flask, the wavelength of 336.1nm by ICP-AES Determination of the amount of titanium in the ore. The detection limit of the method was 3.3 μg / g, which was verified by the analysis of the national standard reference materials. The results were consistent with the standard values. The determination of primary standard GBW07105 12 times, the method precision (RSD) of 1.93%, the method is simple, suitable for bulk ilmenite, vanadium titanium magnetite determination of titanium.