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玻璃等硅酸盐材料中的亚铁和总铁含量影响其制品的某些理化性能,因此,需要对其铁含量加以准确测定,从而便于控制。目前,测定铁含量的通用方法是容量法和吸光光度法,其中以邻菲啰啉显色的吸光光度法是使用较广泛的灵敏度较高的测铁方法,对含铁量较低的硅酸盐材料中铁的测定尤为适合。在使用该方法时,我们通过对Fe(Ⅲ)-Phen(邻菲啰啉)溶液的光化学还原研究,发现和证明了在用该法测定亚铁含量时共存的Fe(Ⅲ)的光化学还原干扰是主要误差源,致使测定结果波动较大,在此研究基础上,建立了测定玻璃等硅酸盐材料中亚铁和总
Ferrous and total iron contents in silicate materials such as glass affect some physical and chemical properties of their products and therefore require an accurate determination of their iron content for ease of control. Currently, the common method for the determination of iron content is the volumetric method and absorbance spectrophotometry, in which the phenanthroline phenanthroline colorimetric method is the use of a wider range of high sensitivity of the iron method, the lower the amount of iron content of silicic acid Determination of iron in the salt material is particularly suitable. In this method, photochemical reduction of Fe (III) -Phen (phenanthroline) solution was used to study the photochemical reduction of Fe (Ⅲ) which coexisted in the determination of ferrous content by this method. Is the main source of error, resulting in large fluctuations in the measurement results, on the basis of this study, the establishment of a determination of glass and other silicate materials, ferrous and total