Studies on Crossed-beam Laser Thermal Lens Spectrophotometry

Abstract

Abstract: A crossed-beam thermal lens technique, in which the unfocused probe beam crosses the pump beam at a certain angle within a homogeneous sample, was used to study the influences of thermal lens position effect, the size of heating beam focal spot, the modulation frequencies and the crossed angles on the thermal lens signals, and the thermal lens signal profile in the far-field. Under optimum conditions at right-crossed-beam, a PAN-Co(Ⅲ) complex in chloroform was determined, the minimal detectable absorbance is 1. 17× 10^-6, corresponding to 1. 7 ng/mL Co²⁺.

Key words: Laser, Thermal lens, Cobalt

TrendMD:

Cao Ji-zheng, Deng Yan-zhuo, Luo Qing-yao. Studies on Crossed-beam Laser Thermal Lens Spectrophotometry[J]. Chem. J. Chinese Universities, 1991, 12(1): 33.

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Studies on Crossed-beam Laser Thermal Lens Spectrophotometry

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