标准摘要
[中文适用范围]: 本文件规定了测定褐煤和褐煤中总腐植酸和游离腐植酸的容量法。 [外文原描述]: This document specifies volumetric methods for the determination of total humic acids and free humic acid of brown coals and lignites.
英文名称Brown coals and lignites — Determination of humic acids