[Development of a SIRI-TOFMS and the application research progress].
The only one set of Sputter Initiated Resonance Ionization-Time of Flight Mass Spectrometer (SIRI-TOFMS) in China was designed and developed. A liquid gallium ion source with micron level diameter of beam, frame-style piezoeletric ceramic sub-micron sample manipulator, a secondary electron imaging system and a computer controlled precise targeting system as well as a real colour big screen image displaying system were added so as to improve its microanalysis capability. By means of this apparatus, trace analysis of Au in minerals and Cu in standard steel samples were carried out. The detection limit of them is 40ng/ and microg/g level, respectively. Aside from the above detections, other preliminary researches ere also performed.
Li
C
C
Department of Modern Applied Physics, Tsinghua University, 100084 Beijing.
Dai
S
S
Dong
G
G
Jin
L
L
Wang
S
S
Ma
W
W
Xue
M
M
Tian
J
J
Wen
K
K
Chen
D
D