Photoconductivity detector components

Poly Chlorinated Biphenyls. The photoconductivity detector provides good responses for polychlorinated biphenyls separated by GPC. The normal matrix components are detected by RI and UV detectors while the polychlorinated species show high responses in the electrochemical detector (Figure 8). ... 

The authors have examined a low frequency vibration of P043- (v4) (500-650 cm-1), which is accessible with a Cu doped Ge photoconductive detector coupled to the IR microscope, and has fewer components than the more commonly studied P043- (vi,v3 ) bands (900-1200 cm-1). The combined X-ray and IR spectroscopic studies revealed that as bone matures the average crystallite size increases, and this can be monitored... 

Figure 7. Block diagram showing the relationship of the photoconductivity detector (PCD) to the other components of the HPLC system. Reproduced with permission from Ref. 1A2. Copyright 1979, Preston Publications, Inc.

For our present consideration g-r noise is the most important noise mechanism. The g-r noise spectmm is flat (white) up until the cutoff frequency, approximately given as the reciprocal value of free carriers lifetime. For the component of this noise not connected with illumination in a case of an ideal photoconductive detector one may write [7]... 

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