Photodiode array spectrometer

M. Glick, K. R. Brushwyler and G. M. Hieftje, Multivariate calibration of a photodiode array spectrometer for atomic emission spectroscopy, Appl. Spectrosc., 45, 1991, 328-333. 

The way we know which peak is which is to record the entire ultraviolet spectrum of each peak as it is eluted, using a photodiode array spectrometer. 

Sullivan, J.J. and Quimby, B.D. (1990) Characterisation of a computerised photodiode array spectrometer for gas chromatography. Anal. Chem., 62, 1034-1043. 

A Dual-Beam Photodiode Array Spectrometer System for Liquid Chromatographic Separation Methods Development... 

Hieftje G. M. and Brushwyler K. R. (1991) Glow-discharge atomic emission spectrometry with a spectrally segmented photodiode-array spectrometer, Appl Spectrosc 45 682-691. 

Simultaneous measurement on the sides of the absorption spectrum. This is justiHed if the identification of the wavelengths is absolute and the observation window (AA) is constant. In principle, these conditions exclude wavelength-scanning devices in favor of photodiode-array spectrometers. These measurements on the sides allow the extension of the measurement to R -t- X + 1 wavelengths in accordance with the complexity of the background and... 

In principle the combination of fibre optics and photodiode array spectrometers shows great advantages in photokinetics. Fibre optic technology allows a wide variation of such set-ups. In the 1960s one tried to achieve a versatile spectrometer by combining modules such as light source, monochromator, cell compartment, and detector on an optical bench. This arrangement of the different components allowed the measurement of absorbance, fluorescence, and reflectance. The same can be achieved nowadays by the use of a so-called simultaneous spectrometer module, schematically presented in Fig. 4.11. 

FIG. 1 Schematic drawing of the high-speed stirring (HSS) apparatus. The organic phase was continuously separated by a PTFE phase separator and circulated through the flow cell in the UV/VIS photodiode array spectrometer. 

Figure 2.70. Bottom spectrometer with wavelength scanning top Photodiode array spectrometer...

K Lepla, G Horlick. Data processing techniques for improved spectrometer measurements with photodiode array spectrometers. Appl Spectrosc 44 1259-1269, 1990. 

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