本文件规定了测定各种纸和纸板中二氧化钛含量的方法，尤其是涂层或填充产品。它包括两个最终测定钛的程序，一个依靠分光光度法，另一个依靠火焰原子吸收分光光度法。测定限值取决于取样量（8.1）。 注:该方法专为测定二氧化钛而设计。以其他形式存在的钛，例如作为粘土成分的钛，不会干扰测定。

This document specifies a method for determining titanium dioxide content in all kinds of paper and board, in particular coated or filled products. It comprises two procedures for the final determination of titanium, one of them relying on spectrophotometry and the other on flame atomic absorption spectrophotometry. The limits of the determination depend on the amount of sample taken (8.1). NOTE The method is designed for the determination of titanium dioxide. Titanium present in other forms, for example as a constituent of clay, will not interfere in the determination.