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在光声光谱分析中,深色固体样品的“信号饱和”是一个严重问题。目前国外开始采用真空喷涂法制样和低吸光物稀释法制样来解决这个问题。本报告叙述了用二氧化硅稀释深褐色二氧化锰样品,并进行光声测定的实验结果。二氧化锰的光声光谱图是在长春光机所工厂试制的GS-1型光声光谱仪样机上测定的。其原理方框图如图1。 GS-1光声光谱仪以500W氙灯作光源,采用双光路系统,用炭黑谱直接归一。所用光调制器斩波频率
Signal saturation in dark solid samples is a serious problem in photoacoustic spectroscopy. At present, foreign countries began to use vacuum spray sample preparation and low absorbance dilution method to solve this problem. This report describes the experimental results of dilute dark brown manganese dioxide samples with silica and photoacoustic measurements. The photoacoustic spectrum of manganese dioxide was measured on a prototype of a GS-1 photoacoustic spectrometer prototype manufactured by Changchun Institute of Optics and Fine Mechanics. The principle block diagram shown in Figure 1. GS-1 photoacoustic spectrometer to 500W xenon lamp as a light source, the use of dual-optical system, with carbon black spectrum directly normalized. The optical modulator used chopping frequency