研究目的
To develop a rapid, simple, and selective method for the determination of sulfite residues in Chinese herbal medicine using headspace thin-film microextraction (HS-TFME) coupled with surface enhanced Raman spectrometry (SERS).
研究成果
The HS-TFME-SERS method developed provides a rapid, simple, and selective approach for the determination of sulfite in Chinese herbal medicine, with potential applications in various solid samples. The method demonstrated good linearity, sensitivity, and accuracy compared to traditional methods.
研究不足
The method's sensitivity and selectivity may be affected by the matrix of the sample and the conditions of the extraction process. Optimization of acidification and extraction parameters is crucial for accurate results.
1：Experimental Design and Method Selection:
The study employed HS-TFME for sample pretreatment and SERS for detection. The ZnO substrate was synthesized for extraction.
2：Sample Selection and Data Sources:
Chinese herbal medicine samples were pulverized and sieved for analysis.
3：List of Experimental Equipment and Materials:
Included a Rigaku Ultima IV X-ray diffractometer, S4800 field emission scanning electron microscope, and a portable spectrometer (DeltaNu Inspector Raman).
4：Experimental Procedures and Operational Workflow:
Involved the preparation of ZnO substrates, Au nanoparticle preparation, TFME, and SERS measurement.
5：Data Analysis Methods:
The SERS signal intensity at 630–640 cm?1 was used for quantitative analysis.
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