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首页> 外文期刊>Talanta: The International Journal of Pure and Applied Analytical Chemistry >Determination of trace elements in fly ash samples by FAAS after applying different digestion procedure
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Determination of trace elements in fly ash samples by FAAS after applying different digestion procedure

机译：应用不同的消解方法，通过FAAS测定粉煤灰样品中的痕量元素

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The fly ash samples obtained from Kangal Power Plant were prepared for FAAS analysis by a new approach. The trace elements of the fly ash samples were leached with appropriate solvents under suitable conditions. The leaching method is known as an effective technique for substances dissolving very hard and refractory materials. The leaching effects of solvents and their mixtures were investigated on fly ash samples that are used largely in analysis of soil and sediment samples.The fly ashes mainly consist of glassy aluminosilicates. The major components of the samples are SiO2, Al2O3, CaO and Fe2O3. Therefore, decomposition of the silicate lattice of the fly ash is required for liberation of trace elements. The dissolution process can be completed by using a mineral acid such as concentrated HCl. This technique has an advantage that the fly ash can be dissolved without any oxidation at room temperature.Maximum element recoveries were obtained by the procedure of 37% HCl leaching after the samples were treated with 2.0 ml of concentrated HE It was also observed that maximum mass loss occurred in this procedure. The effect of the four leaching reagents, which are HCl, HNO3, HClO4 and HNO3 + HClO4. were investigated on fly ash samples that were treated with concentrated HF. An optimum leaching method was determined based on the confidence of analytical results and element recovery rates. (c) 2004 Elsevier B.V. All rights reserved.
机译：从坎加尔电厂获得的粉煤灰样品采用新方法进行了FAAS分析。粉煤灰样品中的微量元素在适当的条件下用适当的溶剂浸出。浸出法被认为是溶解非常坚硬和难熔材料的有效方法。在大量用于土壤和沉积物样品分析的粉煤灰样品上研究了溶剂及其混合物的浸出效果。粉煤灰主要由玻璃态铝硅酸盐组成。样品的主要成分是SiO2，Al2O3，CaO和Fe2O3。因此，为了释放微量元素，需要分解飞灰的硅酸盐晶格。溶解过程可以通过使用无机酸（例如浓盐酸）来完成。这项技术的优点是在室温下可以溶解粉煤灰而不会发生任何氧化。用2.0 ml浓HE处理样品后，通过37％HCl淋洗的程序获得了最大的元素回收率。此过程中发生了损失。四种浸出剂的作用是HCl，HNO3，HClO4和HNO3 + HClO4。对用浓HF处理过的粉煤灰样品进行了研究。根据分析结果的置信度和元素回收率确定了最佳浸出方法。 （c）2004 Elsevier B.V.保留所有权利。

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