在pHH2—9介质中,二价铁与1,10二氮菲形成稳定的橙红色络合物,于波长510nm处比色测定是一个很成熟的方法。但用于多组份的光学玻璃中铁的测定,由于共存元素的干扰,准确度较差。本法将光学玻璃的组份元素硅用氢氟酸挥散除去,其余的金属元素加入EDTA,隐蔽,在高浓度碘离子存在下,Fe(Ⅱ)与1,10二氮菲在高浓度碘离子存在下,所形的Fe In pHH2-9 medium, ferrous iron and 1,10-phenanthroline form a stable orange-red complex, at a wavelength of 510nm colorimetric determination is a very mature method. However, the determination of iron in multi-component optical glasses is less accurate due to the interference of coexisting elements. In this method, the silicon of the optical glass is volatilized and removed with hydrofluoric acid, and the rest of the metal elements are added into the EDTA to conceal it. In the presence of high concentration of iodine ions, Fe (II) and 1,10- In the presence of ions, the shape of Fe