The water content in fumed silica was determined by Coulometric Karl Fischer titrimetry and gravimetric method respectively and these two determinations were compared.

• 使用卡尔·菲休库仑法和重量法分别测定了两种气相法白炭黑微粉中的水分质量分数，为白炭黑水分测定提供了技术途径，并对两种测定方法进行了比较。