The calcium is precipitated as oxalate from the filtrate (rendered just ammoniacal) from the ammonium hydroxide group precipitate. Double precipitation is employed and the precipitate ignited and weighed as calcium oxide.
Số hiệu tiêu chuẩn
SANS 5739:1971*SABS SM 739:1971
Tên tiêu chuẩn
Calcium oxide content of cement and calcined argillaceous material
SANS 5739:1971*SABS SM 739:1971
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