高等学校化学学报
高等學校化學學報
고등학교화학학보
Chemical Journal of Chinese Universities
2015年
11期
2157-2159
,共3页
金伟%于丙文%朱旦%应仰威%于海翔%金钦汉
金偉%于丙文%硃旦%應仰威%于海翔%金欽漢
금위%우병문%주단%응앙위%우해상%금흠한
千瓦级微波等离子体炬%双谐振结构炬管%原子发射光谱
韆瓦級微波等離子體炬%雙諧振結構炬管%原子髮射光譜
천와급미파등리자체거%쌍해진결구거관%원자발사광보
Kilowatt microwave plasma torch%Double resonant configuration%Atomic emission spectrometry
Based on the simulation of transmission and distribution characteristics of the electromagnetic field inmicrowave plasma torch( MPT) torches with different configurations using electromagnetic simulation software and experimental study, a new MPT torch with double resonant configuration was, for the first time, developed. The results show that the inner tube of MPT torch plays an important role in strengthening the elec-tric field intensity at the open end of the MPT torch and redistributing the electromagnetic field in the whole torch by the formation of the double resonance. It contributes also to enhance the macroscopic stability and the self-sustaining of the plasma. The stability of the plasma was shown to be excellent when the spacer between inner and intermediate tubes is located about 20—30 mm from the top opening of the torch. Preliminary study showed that the analytical performance for 13 common elements was approaching that of traditional ICP-AES.
