Artículos de revistas
SIGNAL-TO-NOISE OPTIMIZATION AND EVALUATION OF A HOME-MADE VISIBLE DIODE-ARRAY SPECTROPHOTOMETER
Registro en:
Journal Of Automatic Chemistry. Taylor & Francis Ltd, v. 15, n. 6, n. 227, n. 232, 1993.
0142-0453
WOS:A1993NG95000004
10.1155/S146392469300029X
Autor
RAIMUNDO, IM
PASQUINI, C
Institución
Resumen
This paper describes a simple low-cost multichannel visible spectrophotometer built with an RL512G EGG-Reticon photodiode array. A symmetric Czerny-Turner optical design was employed; instrument control was via a single-board microcomputer based on the 8085 Intel microprocessor. Spectral intensity data are stored in the single-board's RAM and then transferred to an IBM-AT 386SX compatible microcomputer processes the data to recover transmittance, absorbance or relative intensity of the spectra. The signal-to-noise ratio and dynamic range were improved by using variable integration times, which increase during the same scan; and by the use of either weighted or unweighted sliding average of consecutive diodes. The instrument is suitable for automatic methods requiring quasi-simultaneous multiwavelength detections, such as multivariative calibration and flow-injection gradient scan techniques. 15 6 227 232