RESUMEN
Objective:To determine phenolphthalein illegally added into diet health products by Raman spectroscopy. Methods:Raman spectroscopy was used to determine phenolphthalein added into diet health products. The diet health products were extracted by suitable solvents, and then the extracting solution was measured by Raman spectroscopy. Results: A calibration curve was built and the analysis was performed on the samples with phenolphthalein at different concentrations. The results were accordance with the real added amount. Conclusion:With simple sample preprocessing method, Raman spectroscopy can be used in the fast detection of phe-nolphthalein illegally added into diet health products. The method is fast and simple with low cost, and can provide both qualitative and quantitative results. The detection limit is 1% for phenolphthalein in diet health products.
RESUMEN
Objective:To develop a method for the rapid identification and determination of gatifloxacin injections by Raman spec-troscopy. Methods:Raman spectroscopy was used as the method of identifying and determining gatifloxacin injections. The determina-tion conditions were as follows:a micro Raman spectroscopy, excitation wavelength:785nm, objective lens:50X, laser power:3mW, signal acquisition time:60s. Results:The result showed that the Raman spectroscopy could identify and determine gatifloxacin injec-tions, the content of gatifloxacin in the injections was respectively 99. 49%,97. 56% and 100. 2%(Specification:10ml∶0. 2g), and 97. 75%, 94. 58% and 96. 25%(Specification:2ml∶0. 1g), and there was no significant difference between the above determination results and the results from the HPLC method by t-test. Conclusion:For the fast and nondestructive properties, the presented method can be developed as an analysis method for gatifloxacin injections.