Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok, 10330, Thailand.
The Chemical Approaches for Food Applications Research Group, Faculty of Science, Chulalongkorn University, Phayathai Rd., Pathumwan, Bangkok, 10330, Thailand.
Sci Rep. 2021 Aug 9;11(1):16089. doi: 10.1038/s41598-021-95462-0.
With increasing demands for more rapid and practical analyses, various techniques of ambient ionization mass spectrometry have gained significant interest due to the speed of analysis and abundance of information provided. Herein, an ambient ionization technique that utilizes corona discharge was applied, for the first time, to analyze and categorize whole seeds of black and white peppers from different origins. This setup requires no solvent application nor gas flow, thus resulting in a very simple and rapid analysis that can be applied directly to the sample without any prior workup or preparation. Combined with robust data pre-processing and subsequent chemometric analyses, this analytical method was capable of indicating the geographical origin of each pepper source with up to 98% accuracies in all sub-studies. The simplicity and speed of this approach open up the exciting opportunity for onsite analysis without the need for a highly trained operator. Furthermore, this methodology can be applied to a variety of spices and herbs, whose geographical indication or similar intellectual properties are economically important, hence it is capable of creating tremendous impact in the food and agricultural industries.
由于对更快速和实用分析的需求不断增加，各种大气离子化质谱技术由于其分析速度快和提供的信息量丰富而引起了极大的关注。在此，首次应用利用电晕放电的大气离子化技术来分析和分类来自不同产地的黑胡椒和白胡椒的完整种子。该装置无需使用溶剂或气流，因此分析非常简单快速，可以直接应用于样品，无需任何预处理或准备。结合强大的数据预处理和后续化学计量学分析，该分析方法能够以高达 98%的准确率指示每个胡椒来源的地理来源。这种方法的简单性和速度为现场分析开辟了令人兴奋的机会，而无需高度训练的操作人员。此外，该方法可以应用于各种香料和草药，其地理标志或类似的知识产权在经济上非常重要，因此它能够在食品和农业行业产生巨大影响。
