Identification of sulfur fumed Pinelliae Rhizoma using an electronic nose
Xia Zhou1, Jun Wan1, Liang Chu2, Wengang Liu2, Yafeng Jing2, Chunjie Wu2★★ Corresponding author
- 1Life Science and Engineering College of South‑west Jiao‑tong University, China.
- 2Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China.
CORRESPONDENCE
Chunjie Wu
Department of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China.
Received: 04-10-2012; Revised: 06-10-2012.
Volume 10, Issue 37s · pp. S135–S140 · PUBLISHED 21 February 2014 · DOI: 10.4103/0973-1296.127363
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ABSTRACT
Background: Pinelliae Rhizoma is a commonly used Chinese herb which will change brown during the natural drying process. However, sulfur fumed Pinelliae Rhizoma will get a better appearance than naturally dried one. Sulfur fumed Pinelliae Rhizoma is potentially toxical due to sulfur dioxide and sulfites formed during the fuming procedures. The odor components in sulfur fumed Pinelliae Rhizoma is complex. At present, there is no analytical method available to determine sulfur fumed Pinelliae Rhizoma simply and rapidly. To ensure medication safety, it is highly desirable to have an effective and simple method to identify sulfur fumed Pinelliae Rhizoma. Materials and Methods: This paper presents a novel approach using an electronic nose based on metal oxide sensors to identify whether Pinelliae Rhizoma was fumed with sulfur, and to predict the fuming degree of Pinelliae Rhizoma. Multivariate statistical methods such as principal components analysis (PCA), discriminant factorial analysis (DFA) and partial least squares (PLS) were used for data analyzing and identification. The use of the electronic nose to discriminate between different fuming degrees Pinelliae Rhizoma and naturally dried Pinelliae Rhizoma was demonstrated. Results: The electronic nose was also successfully applied to identify unknown samples including sulfur fumed samples and naturally dried samples, high recognition value was obtained. Quantitative analysis of fuming degree of Pinelliae Rhizoma was also demonstrated. The method developed is simple and fast, which provides a new quality control method of Chinese herbs from the aspect of odor. Conclusion: It has shown that this electronic nose based metal oxide sensor is sensitive to sulfur and sulfides. We suggest that it can serve as a supportive method to detect residual sulfur and sulfides.
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Zhou, X., Wan, J., Chu, L., Liu, W., Jing, Y., & Wu, C. (2014). Identification of sulfur fumed Pinelliae Rhizoma using an electronic nose. Pharmacognosy Magazine, 10(37s), S135–S140. https://doi.org/10.4103/0973-1296.127363