| 摘要 |
PURPOSE:To enhance analytical efficiency while improving analytical sensitivity, by sampling photometric output in timing suitable for each element in one discharge, and integrating photometric outputs in a large number of times of discharges. CONSTITUTION:Photoelectric converter elements P1-Pn are arranged at bright line positions of elements to be respectively analyzed in the spectrum image surface of a spectroscope. Section integrators I1-In succeeding to the photoelectric converter elements are ones for taking in photometric outputs only during the application of a sampling pulse to integrate the same and the sampling pulse reset prior to the starting of integration is cooperated with the discharge operation in a spark discharge light emitting apparatus S and a trigger signal in synchronous relation to the trigger of spark discharge is applied to a sampling pulse generating circuit G. A multiplexer Mu completes one scanning of each of A/D converters ADC1-ADCn during one cycle of spark discharge while CPU discriminates the sampling photometric output of each element at every one discharge sent from the multiplexer Mu and inputs the same to the address corresponding to each element in memory Me to integrate the same. |
