99.60 Withdrawal effective Sep 12, 2007
CEN
CEN/TC 184 Advanced technical ceramics
European Norm
81.060.99 Other standards related to ceramics
Withdrawn
This part of EN 725 specifies methods for the determination of elements of sodium, potassium, iron, silicon, calcium and magnesium present as impurities in alumina using atomic absorption (AAS) or inductively coupled plasma (ICP) instruments. For each element present as impurities, the methods are applicable to the following ranges, calculated as oxides: Sodium oxide: 20 ppm to 6000 ppm;Potassium oxide: 20 ppm to 100 ppm; Ferric oxide: 20 ppm to 300 ppm; Silica: 50 ppm to 2000 ppm; Calcium oxide: 20 ppm to 700 ppm; Magnesium oxide: 5 ppm to 1000 ppm.
WITHDRAWN
EN 725-1:1997
99.60
Withdrawal effective
Sep 12, 2007
PUBLISHED
EN 725-1:2007