高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (6): 495.

• 论文 • 上一篇    下一篇

强脉冲激光激发的热透镜光度分析法

邓延倬1, 曹建文1, 刘村1, 陈观铨1, 曾云鹗2   

  1. 1. 武汉大学分析测试中心;
    2. 武汉大学化学系
  • 收稿日期:1986-01-10 出版日期:1987-06-24 发布日期:1987-06-24
  • 基金资助:

    中国科学院科学基金

Thermal Lens Spectrophotometry Based on Strong Pulsed Laser Excitation

Deng Yanzhuo1, Cao Jianwen1, Liu Cun1, Chen Guanquan1, Zeng Yun'e2   

  1. 1. Centre of Analysis and Testing, Wuhan University, Wuhan;
    2. Department of Chemistry, Wuhan University, Wuhan
  • Received:1986-01-10 Online:1987-06-24 Published:1987-06-24

PDF (PC)

被引次数

9

摘要： 用自装的热透镜测量装置,观察了强脉冲激光作用下的热透镜行为。测量丙酮/水混合液中的Cocl2,检测限为3×10-7M,相当于6×10-6的吸光度。将差分放大技术用于热透镜测量,降低了He-Ne激光振幅噪声的影响,改善了信噪比。

Abstract: The thermal lens effects based on the strong pulsed laser excitation were observed by using the home-made experimental apparatus. In acetone-water mixture concentrations of CoCl2as low as 3×10-7M have been determined with present setup, which corresponds to an absorbance of 6×10-6. In thermal lens measurements the noise level due to shot-term instability of the He-Ne laser output amplitude can be reduced down by the use of differential amplification technique, thus the S/N ratio is improved appreciably.

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