DIN 52342-2

Testing of raw materials for the production of glass; chemical analysis of arenaceous quartz with at least 98 % silica, fusion process for the determination of Al<(Index)2>O<(Index)3>, Fe<(Index)2>O<(Index)3> and TiO<(Index)2> as we-ll as CaO, MgO, Na<(Index)2>O and K<(Index)2>O
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 01/01/1980