Method of test for pulp and paper, Method 422: Paper, board and pulps - Determination of pH of aqueous extracts - Hot extraction
纸浆和纸的试验方法 方法422:纸、纸板和纸浆.水提取物pH值的测定.热萃取
This document adopts ISO 6588-2:2020, which specifies a method for the determination of the pH-value defined by the electrolytes extractable by hot water from a sample of paper, board or pulp.