Additionally, wavelet denoising combined with similarity calculation was used to establish an automated approach for discrimination of adulterated healthcare products. Thus, the use of micro Raman spectroscopy provides a quick, convenient and nonrdestructive method for screening adulterated chemicals in healthcare products. We compared ten samples, secured by administrative authorities in Shanghai, to analyse and demonstrate the capabilities of our proposed method. Correlation coefficient was chosen for similarity calculation based on the spectra collected and the standard Raman spectra of pure sildenafil and tadalafil. If you have any sort of inquiries pertaining to where and how you can utilize [url=https://gncedstore.com/#]buy viagra[/url], you could contact us at our own web site.