Two-laser induced selective infrared-visible fluorescence for thin film analysis

Journal Article · Thu May 01 04:00:00 EDT 1980 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac50056a048· OSTI ID:6256041

Richardson, J H; Dering, J P; Johnson, D C; Hrubesh, L W

A laser technique has been developed to enhance its sensitivity for thin film analysis of mixtures. A c-w visible or uv laser was used to stimulate visible fluorescence from a thin fluorophor film, and a chopped low-power infrared laser was used to selectively excite characteristic infrared absorption bands in the sample. The resulting modulated visible fluorescence signal was monitored by an optical detection system. The technqiue has been applied to the quantitative determination of mixtures of coumarin 7, rubene, and rhodamine 6G; however, quantitative analysis has been impossible due to the difficulty in obtaining a uniform thin film. (BLM)

• Research Organization: Univ. of California, Livermore
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6256041
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 52:6; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
AMINES
AROMATICS
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
COUMARIN
DYES
EMISSION SPECTROSCOPY
ESTERS
FLUORESCENCE SPECTROSCOPY
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
LACTONES
LASER SPECTROSCOPY
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PYRANS
QUALITATIVE CHEMICAL ANALYSIS
REAGENTS
RHODAMINES
SPECTROSCOPY