[Improving spectral property of light source to increase signal-to-noise ratio of optical multichannel analyzer in measurement of absorbances].
In the present paper we report that the spectral property of light radiation was improved by using the method of increasing intensity of short wave radiation for increasing signal-to-noise ratio (S/N) of CCD-OMA in measurement of sample's absorbance in visible light-region especially short wave region. The signal-to-noise ratio resulting from the recording of short wave region for improved light source was increased by 8 times as high as that of a general Wlamp. As demonstrated by the experiment, absorbance spectrum with high S/N ratio can be obtained in the entire visible light region by using the improved light source in the measurement of absorbance.
Chen
L
L
Department of Physics, Sichuan University, 610064 Chengdu.
Guo
J
J
Yang
J
J