提出了一种试样无需分离，测定简便快速，称为恒温热分离称重法的测定火药包覆材料中硝化甘油含量的新方法，并应用于有机玻璃中硝化甘油浓度分布的测定。对于５ｍｇ的试样，当硝化甘油浓度为４０％～１％时，５次测定的标准偏差约为０．４％。不仅可用无ＤＴＧ的热天平，而且也可用其它常用热分析仪（如ＤＴＡ、ＤＳＣ）进行热分离，在与十万分之一的天平配合后，即能直接测定包覆材料中硝化甘油的含量。 A new method for the determination of nitroglycerin content in gunpowder coating material is proposed, which is simple, rapid and free from the need of separation and determination. The method is applied to the determination of nitroglycerin concentration distribution in plexiglass. For a 5 mg sample, the standard deviation for five determinations was about 0.4% at a nitroglycerin concentration of 40% to 1%. Not only thermobalances without DTG, but also with other commonly used thermal analyzer (such as DTA, DSC) for thermal separation, with one hundred thousandth of the balance with, that is, can directly measure the content of nitroglycerin in the coating material .