以本所研制的增压坩埚为容器,用盐酸作溶剂,密封增压溶解高铝陶瓷或氧化铝试样,以电感耦合高频等离子体-原子发射光谱法,并采用三标准试样法,不用内标,同时测得试液中的钙、镁、硅和铁。当此四元素氧化物含量为0.01～0.48%时,相对标准偏差为±10.4%。 Using pressurized crucible developed by our institute as a container, hydrochloric acid was used as a solvent to seal and pressurize high alumina ceramics or alumina samples by inductively coupled high-frequency plasma-atomic emission spectrometry, and three standard samples were used. Without the internal standard, while measuring the test solution of calcium, magnesium, silicon and iron. When the four-element oxide content is 0.01-0.48%, the relative standard deviation is ± 10.4%.