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Determination of chromium content in potassium dichromate used for fireworks and firecrackers based on Energy Dispersive X-ray Fluorescence Spectrometry (EDXRF)

机译:基于能量分散X射线荧光光谱法(EDXRF)的烟花和爆竹用于烟花和鞭炮中铬含量的铬含量的测定

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Methods used for the determination of chromium content in potassium dichromate are mostly based on traditional chemical method, which is lengthy and cumbersome. If inductively coupled plasma emission spectrometry or atomic absorption spectrometry are used to determine the chromium with high content, the sample solution must be highly diluted, and it must produce errors in measurement and calling into question the reliability of the data. The method mentioned in this paper is about the determination of chromium content in potassium dichromate used for fireworks and firecrackers based on energy dispersive X-ray fluorescence spectrometry by controlling matrix effects between elements. Using sample solution of potassium dichromate in specific concentrates, the chromium content can be determined by the specific calibration curve established with an intensity calibration. This method can provide high accuracy and good precision in a short time with a simple process by efficiently controlling the matrix effects. It can fully meet the requirements for the determination of chromium in potassium dichromate used for different kinds of fireworks and firecrackers around the world, and it has good generalization and practicability. The average recovery of the method can reach 97.91%~98.91%, allowing for a difference of 0.5%.
机译:用于测定二聚角铬含量测定的方法主要基于传统化学方法,这是冗长和繁琐的。如果使用电感耦合等离子体发射光谱法或原子吸收光谱法测定具有高含量的铬,则必须高度稀释样品溶液,并且它必须在测量中产生误差并呼吁质疑数据的可靠性。本文提到的方法是基于能量分散X射线荧光光谱法测定用于烟花和鞭炮的钾二聚相中的铬含量通过控制元件之间的基质效应。使用特定浓缩物中二色素的样品溶液,铬含量可以通过强度校准建立的特定校准曲线来确定。通过有效地控制矩阵效应,该方法可以在短时间内提供高精度和良好的精度。它可以充分满足用于不同种类的烟花和世界各地烟花和鞭炮的钾铬中铬的要求,具有良好的泛化和实用性。该方法的平均回收率可达到97.91%〜98.91%,允许差异为0.5%。

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