Raman spectrum based substance qualitative detection method
A Raman spectroscopy and qualitative detection technology, applied in Raman scattering, special data processing applications, instruments, etc., can solve the problems of unpredictable sample conditions, large error of characteristic peak ratio, breakthrough threshold, etc., to eliminate fluorescence and other interferences Effects of factors, reduction of characteristic peak width, and effect of improving efficiency
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[0049] Example one:
[0050] A qualitative detection method for substances based on Raman spectroscopy, used for the qualitative detection of polypropylene (PP) lunch box materials, which are usually filled with CaCO 3 Or Na 2 CO 3 PP material, representative of the spectrum is 600-1800cm -1 range. The method includes the following steps:
[0051] S1. Establish Raman normalized second-order spectrum library of standard products:
[0052] It includes the following processes:
[0053] S1-1. Use a Raman spectrometer with high resolution and high signal-to-noise ratio to collect the Raman spectra of PP (polypropylene) standards, figure 1 Is the collected PP (polypropylene) standard product in the wave number range of 600-1800cm -1 Raman spectrum (excited by 532nm laser).
[0054] S1-2. In 1cm -1 Accuracy, for PP (polypropylene) standard products in the wave number range of 600-1800cm -1 Interpolation of Raman spectrum data, in the wavenumber shift range of 600-1800cm -1 Corresponds to inte...
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