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  • 1
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 22 (1991), S. 191-196 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The silver colloid surface-enhanced Raman scattering (SERS) spectrum of phenylpropanolamine (PPA) and the surface-enhanced resonance Raman scattering (SERRS) spectrum of the PPA-ninhydrin reaction product were studied. It was found that the spectral intensity varied with time, and the rate of the variation was related to the PPA concentration. From scanning electron microscopic photographs taken at different times, the SERS intensity appeared to be correlated with the coagulation of silver particles. Temperature was found to be another factor that would change the kinetic rate of the coagulation. Addition of potassium chloride served effectively to activate the surface-enhanced effect and to reduce the time required to reach maximum intensity. The rate of activation was found to be dependent on the concentration.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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