Instrumentation transient digitizer

There has been a considerable decline in the number of papers which deal with the details of techniques of measurement of fluorescence decay. This is no doubt due to the fact that the alternative methods are now essentially well established. Nevertheless a microcomputerized ultrahigh speed transient digitizer and luminescence lifeline instrument has been described . A very useful multiplexed array fluorometer allows simultaneous fluorescence decay at different emission wavelength using single photon timing array detection . Data collection rates could approach that for a repetitive laser pulse system and the technique could be usefully applied to HPLC or microscopy. The power of this equipment has been exemplified by studies on aminotetraphenylporphyrins at emission wavelengths up to 680 nm. The use and performance of the delta function convolution method for the estimation of fluorescence decay parameters has been... 

The transient recorder can be used as a digital oscilloscope for instrument tuning and diagnostics, as a gated integrator for ESEEM studies and as a transient recorder for FT-EPR. The maximum repetition rate is often limited by the TWTA duty cycle, but it is routine to operate the instrument at 1 2 kHz repetition rates. 

A discussion of the instrumental aspects of voltammetry and leading references to the original literature can be found in some of the monographs already cited in the introduction [1-4]. The essential units are the potentiostat, a triangular waveform generator, and a recording device. The latter is most conveniently a digital oscilloscope or a transient recorder. Commercial equipment with the units combined into one instrument controlled by a PC is available from a number of manufacturers. Also, homebuilt instrumentation... 

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