本文叙述了一种利用~(109)Cd同位素源发射的AgK_αX射线对煤所产生的康普顿散射强度和同一源激发出煤中铁元素的X射线荧光强度来确定煤灰量的方法。含灰量范围6—50％,最大标准偏差小于±1.5％,与化学重量法比较,相对误差小于±1.5％。文中还对不同能量的放射源测定煤灰量进行了讨论。 This paper describes a method for determining the amount of coal ash by using the intensity of Compton scattering from coal emitted from AgK_α X-ray emission from the source of ~ (109) Cd isotope and the X-ray fluorescence intensity of iron from the same source. The gray content range of 6-50%, the maximum standard deviation of less than ± 1.5%, compared with the chemical gravimetric method, the relative error of less than ± 1.5%. The paper also discusses the measurement of coal ash with different energy sources.