Pulsed photothermal phase-shift spectroscopy for weak absorption measurement.
A novel photothermal phase-shift spectroscopy configuration based on the retro-reflected beam interference has been developed and its operational principle is described. The weak absorption measurement ability of this technique is experimentally proven with a water/ethanol solution of standard Pyronine G dye and the limit of detection is found to be 1.8 x 10(-6) absorbance. Potential applications of the technique are discussed.
Li
B
B
Department of Chemistry, Wuhan University, Wuhan 430072, Hubei, People's Republic of China.
Deng
Y
Y
Cheng
J
J