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用盐酸溶解样品 ,火焰原子吸收光谱法测定四氧化三锰中铁、钙、镁、钾、钠 ,石墨炉原子吸收光谱法测定其中的铬。对测定条件进行了试验 ,找出了最佳溶样方法和酸度 ,并对共存元素的干扰及排除进行试验 ,获得了满意的效果。该法简便、快速、准确 ,样加标回收率为 98.6%～ 1 0 9.6%之间 ,相对标准偏差为 1 .61 %～ 4.96%之间 ,倍比实验、标准曲线法和标准加入法结果相吻合 ,适用于四氧化三锰样品中铁、钙、镁、钾、钠、铬元素的分析。
Determination of Chromium in Iron (Ⅲ), Manganese, Potassium, Sodium and Graphite Furnace Atomic Absorption Spectrometry with Flame Atomic Absorption Spectrometry after Dissolving Samples with Hydrochloric Acid. The test conditions were tested, the best solution method and acidity were found, and the interference and elimination of coexisting elements were tested. The satisfactory results were obtained. The method was simple, rapid and accurate. The recoveries of standard additions ranged from 98.6% to 106.6% with relative standard deviations of 1.61% -4.66%. The results of multiple ratio experiment, standard curve method and standard addition method Match, suitable for the sample of manganese tetroxide iron, calcium, magnesium, potassium, sodium, chromium element analysis.