DIN 52240-7-1994 玻璃生產用原料的檢驗.碳酸鈣最低含量為 95% 的石灰石的化學分析.第7部分:按氧化錳計算方法對錳含量的測定
Testing of raw materials for the production of glass; chemical analysis of limestone with a minimum content of 95% calcium carbonate; determination of manganese content calculated as MnO
This document specifies the photometric determination and the determination by flame atomic absorption spectrometry of the manganese content of limestone with a minimum content of 95% calcium carbonate.