Determination of Organics on Metal Surfaces by Raman Spectroscopy

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Detection limits of about 1 g/m2 are demonstrated for the Raman determination of two organic materials, polydimethylsiloxane and dimethyl methylphosphonate, on an aluminum surface. A fiber-optic-based system is used. A large sample area is scanned to overcome heterogeneity in sample coverage. Measurements are made without use of an internal standard. Results are reported for both a Hadamard transform technique with argon-ion laser excitation and a conventional spectrometer with diode laser excitation.

Keywords: Diode laser; Films, Hadamard transform; Raman spectroscopy

Document Type: Research Article


Affiliations: Department of Chemistry, Florida State University, Tallahassee, Florida 32306-3006

Publication date: November 1, 1993

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