为配合航煤添加T305添加剂的研究,我们建立了测量航煤中微量石油酸的方法。本方法采用60～80目的活性粗孔硅胶1克,富集航煤中的石油酸,再用乙醚定量脱附石油酸。采用吡啶—硫酸铜显色,正庚烷作溶剂萃取比色,最大吸收波长为690mμ。本方法的相对误差为10％,整个实验约用3小时。由于采用硅胶富集石油酸,所以原则上对石油酸含量在1ppm以上油样均可分 In order to cooperate with aviation coal to add T305 additive research, we have established the method to measure trace petroleum acid in aviation coal. The method uses 60 to 80 mesh active coarse pore silica gel 1 g, rich in aviation coal oil acid, and then quantitative determination of petroleum ether desorption. Pyridine - copper sulfate color, n - heptane solvent colorimetric extraction, the maximum absorption wavelength of 690mμ. The relative error of this method is 10%, the whole experiment takes about 3 hours. As the use of silica gel enrichment of petroleum acid, so in principle, the oil content of 1ppm or more oil samples can be divided