Determination of Sulfite in Botanical Medicine Using Headspace Thin-Film Microextraction and Surface Enhanced Raman Spectrometry

被引：19

作者：

Dong, Jing ^{[1
,2
]}

Cai, Lemei ^{[1
,2
]}

Wang, Shuya ^{[1
,2
]}

Wang, Yiru ^{[1
,2
]}

Chen, Xi ^{[1
,2
,3
]}

机构：

[1] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen, Peoples R China

[2] Xiamen Univ, MOE Key Lab Spectrochem Anal & Instrumentat, Coll Chem & Chem Engn, Xiamen, Peoples R China

[3] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Peoples R China

来源：

ANALYTICAL LETTERS | 2019年 / 52卷 / 08期

关键词：

Headspace thin-film microextraction (HS-TFME); scanning electron microscopy (SEM); surface enhanced Raman spectrometry (SERS); transmission electron microscopy (TEM); X-ray diffraction (XRD); PESTICIDE-RESIDUES; SCATTERING; FRUITS;

D O I：

10.1080/00032719.2018.1529183

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A facile method using headspace thin-film microextraction (HS-TFME) coupled with surface enhanced Raman spectrometry (SERS) has been developed for the determination of sulfite in traditional Chinese herbal medicine. The extraction substrate was synthesized by depositing urchin-like ZnO micron particles on glass sheets using chemical liquid phase deposition. Under the optimal conditions, the intensity of the SERS signal at 630-640 cm(-1) provided a good linear relationship with the concentration of sulfite from 25 to 400 mg/kg, and the linear correlation coefficient (R) was 0.996 with a detection limit of 6 mg/kg. The method was employed for the determination of sulfite in herbal medicines, and the results were confirmed by a traditional distillation-titration method. Therefore, this developed HS-TFME-SERS method may play an important role in the rapid, simple, and selective determination of sulfite residues in Chinese herbal medicine and become a potentially universal method for this analyte in various solid samples.

引用

页码：1236 / 1246

页数：11

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