VI New Patents

tromagnetic field boundary conditions. Both resonance and non-resonance ionization of selected neutral atomic components allow ac- cumulation of increased chemical information. A multiplexed operation between a SIMS mode and a neutral -atomic component ionization mode with EARTOF analysis enables com- parison of chemical information from secondary ions and neutral atomic components removed from the sample. An electronic system is described for switching high level signals, such as SIMS signals, directly to a transient recorder and through a charge amplifier to the transient recorder for a low level signal pulse counting mode, such as for a neutral atomic component ionization mode.

4890919

ATOMIC ABSORPTION SPECTROPHOTOMETER

Masamichi Tsukada, Konosuke Oishi, Kat- suhito Harada, Toyoharu Okumoto, Ibaraki, Japan assigned to Hitachi Ltd

An atomic absorption spectrophotometer is dis- closed in which, in order to detect the tempera- ture of a graphite cuvette correctly on the basis of the radiation emitted from the inner wall of the graphite cuvette, the above radiation and the measuring light emitted from a hollow cathode lamp are both taken out by the same optical members, and then the radiation is separated from the measuring light, to be detected and used for measuring the temperature of the graphite cuvette.

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