精细石油化工

建立了一种双靶单色X-射线荧光聚焦激发快速同时测定煤及煤灰中12种元素的分析方法。试样采用硼酸塑形镶边粉末压片，通过银靶材X光管，经锗双曲面弯晶衍射出银L_α 2.984 keV单色线，同时锗双曲面弯晶作为二次靶激发出锗K_α 9.876 keV和K_β 10.983 keV单色线，共同聚焦于激发煤或煤灰样片，配套碳窗硅漂移探测器，搭载全息基本参数算法软件，较好地检测了煤及煤灰中含量从常量到微量的12种元素成分（Na、Mg、Al、Si、P、S、Cl、K、Ca、Ti、Mn、Fe），其中7种元素RSD<5.0%,5种元素RSD<8.0%，满足生产实际需求，同时提升了试样适应性和定量准确度。

A dual target monochromatic X-ray fluorescence focused excitation method was established for rapid and simultaneous determination of 12 elements in coal and coal ash. The sample was prepared as boric acid-shaped edge tablets by pressing the powders. A silver-target X-ray tube was employed, with a germanium hyperbolically curved crystal diffracting the Ag L_α(2.984 keV) monochromatic light. Simultaneously, the same germanium crystal served as a secondary target to excite Ge K_α(9.876 keV) and Ge K_β(10.983 keV) monochromatic lights, which were focused together on coal/coal ash samples. Combined with a carbon-window silicon drift detector and holographic fundamental parameters algorithm software, this method effectively detected 12 elements(Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Mn, Fe) ranging from major to trace concentrations. The relative standard deviation(RSD) of 7 elements is below 5.0% and the RSD of 5 elements is less than 8.0%, which not only improves sample adaptability and quantitative accuracy but also meets practical production requirements.