- Ascorbic acid and ammonium dihydrogen phosphate solution were used as the matrix modifier.
采用抗坏血酸和磷酸二氢铵作混合基体改进剂，热解涂层石墨管，塞曼扣背景。
- The system adopted two-stage ammonium process to produce liquid sulphur dioxide and ammonium bisulphite.
尾吸系统采用二段氨法生产液体二氧化硫和亚硫酸氢铵。
