ISO 6382-1981 测定硅含量的一般方法 还原硅钼酸盐分光光度法

       Specifies a method based on the depolymerization of any polymerized silica by  treatment with sodium fluoride in the presence of hydrochloride acid resulting in the formation of the oxidized molycdosilicate, followed by the selective reduction of this complex in the presence of oxalic acid and in a sulphuric acid medium, and spectrophotometric measurement of the blue-coloured complex at the wavelength corresponding to maximum absorption (about 800 nm).