DIN 52241-5:1986
制造玻璃原料的分析.對含碳酸鈣鎂不小于95%的白云石的化學分析.按氧化鐵(Ⅲ)計算的總鐵含量的測定
Analysis of raw materials used in glass production; chemical analysis of dolomite containing not less than 95 % of calcium magnesium carbonate; determination of total iron content calculated as iron(III)oxide