Trends in Extraction, Chromatographic Separation and Detection Techniques for the Analysis of Natural Organic Compounds

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Separation Processes".

Deadline for manuscript submissions: closed (20 December 2023) | Viewed by 2251

Special Issue Editors


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Guest Editor
Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia
Interests: analytical methods (extraction, isolation, separation, detection); liquid chromatography; gas chromatography; mass spectrometry; deep eutectic solvents; plant extracts

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Guest Editor
Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia
Interests: water analysis; wastewater treatment; chromatography

Special Issue Information

Dear Colleagues,

Nowadays, more and more different chromatographic approaches with a variety of sample preparation procedures, extraction and detection techniques are used for the isolation, separation, identification and quantification of unknown and known organic compounds from a wide range of natural samples (plant samples, environmental samples such as water or soil samples, etc.). Both extraction techniques and chromatography systems have improved dramatically over the past 30 years.  Equipment has evolved from complex, expensive, and sophisticated research instruments to inexpensive, robust, and easy-to-use routine systems. And as the instruments have improved, more applications have been developed. Today, chromatography is a very useful technique for the analysis of various organic molecules and, when combined with appropriate detectors, offers higher sensitivity and selectivity for trace analysis of multicomponent mixtures. The method is suitable for analysis in biomedical, pharmaceutical, environmental chemistry and some other fields. Various chromatographic techniques are suitable for the analysis of different molecules, large and small, polar and nonpolar, labile compounds, etc. Selective detection methods (such as mass spectrometry) allow rapid confirmation of the identity of a wide range of volatile and nonvolatile organic compounds and provide sensitive and accurate molecular weight and fragmentation data. For this special issue, researchers are invited to submit original work on new or improved extraction techniques and analytical methods that use chromatographic methods for the separation and determination of unknown and known organic compounds from various natural matrices, and also to discuss the potential of newly applied methods.

Dr. Maša Islamčević Razboršek
Prof. Dr. Marjana Simonič
Guest Editors

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Keywords

  • analytical methods (extraction, isolation, separation, detection)
  • natural samples (plant samples, environmental samples, water samples, soil samples etc.)
  • liquid chromatography (LC)
  • gas chromatography (GC)
  • high performance liquid chromatography (HPLC)
  • mass spectrometry (MS)
  • organic compounds
  • aqueous solution
  • water

Published Papers (2 papers)

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Research

12 pages, 2010 KiB  
Article
The Assessment of Fatty Acid Composition in Deep-Fried Dough Sticks across Five Cities in China in 2020
by Kunlun Wang, Lin Li, Nan Li, Runhui Ke, Dezheng Yuan, Taotao Deng, Sana Liu, Yixuan Wu, Daiying Zuo, Haiqin Fang and Aidong Liu
Processes 2023, 11(11), 3254; https://doi.org/10.3390/pr11113254 - 20 Nov 2023
Viewed by 798
Abstract
Objective: To analyze and compare the concentrations and dietary intake of different fatty acids (FAs) in deep-fried dough sticks (Chinese fried bread) across various cities in China. Method: Sixty-one deep-fried dough stick samples were collected from five cities (Beijing, Shijiazhuang, Guangzhou, Chongqing, and [...] Read more.
Objective: To analyze and compare the concentrations and dietary intake of different fatty acids (FAs) in deep-fried dough sticks (Chinese fried bread) across various cities in China. Method: Sixty-one deep-fried dough stick samples were collected from five cities (Beijing, Shijiazhuang, Guangzhou, Chongqing, and Hangzhou), and the contents of FA monomers were determined using gas chromatography. Moreover, the dietary FA intake was estimated. Results: The mean FA concentration was 18.83 g/100 g (maximum, 41.59 g/100 g; minimum, 4.88 g/100 g). Polyunsaturated FAs (PUFAs) accounted for the highest proportion of the total FAs at 41.7% (7.86 g/100 g), followed by monounsaturated FAs (MUFAs) at 30.77% (5.79 g/100 g), saturated FAs (SFAs) at 26.27% (4.95 g/100 g), and trans-FAs (TFAs) at 1.18% (0.22 g/100 g). The Guangzhou deep-fried dough stick samples had a significantly different FA composition than those from the other cities, presenting with the highest concentration of SFAs (8.64 ± 4.74 g/100 g) and lowest concentration of PUFAs (5.01 ± 3.41 g/100 g). Beijing had the highest intake of PUFAs and MUFAs, whereas Guangzhou had the highest intake of SFAs. Conclusion: The contents and intake of saturated and unsaturated FAs in deep-fried dough sticks varied across the five cities in China. These results are useful for comparing the nutritional characteristics of deep-fried dough sticks in the different cities of China, thereby promoting further research on the relationship between deep-fried dough stick consumption and human health. Full article
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14 pages, 1364 KiB  
Article
Ultra-Performance Liquid Chromatography with Tandem Mass Spectrometry for Simultaneous Analysis of 22 Analytes of Oncheong-Eum, a Traditional Korean Herbal Formula
by Chang-Seob Seo and Hyeun-Kyoo Shin
Processes 2023, 11(10), 2906; https://doi.org/10.3390/pr11102906 - 3 Oct 2023
Cited by 2 | Viewed by 946
Abstract
Oncheong-eum (OCE) is a traditional Korean herbal formula comprising eight medicinal herbs for treating skin disorders, including eczema and skin rashes. Here, we sought to simultaneously analyze 22 analytes of OCE using ultra-performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS). All analytes were separated on [...] Read more.
Oncheong-eum (OCE) is a traditional Korean herbal formula comprising eight medicinal herbs for treating skin disorders, including eczema and skin rashes. Here, we sought to simultaneously analyze 22 analytes of OCE using ultra-performance liquid chromatography–tandem mass spectrometry (UPLC–MS/MS). All analytes were separated on a Waters Acquity UPLC BEH C18 column (2.1 mm × 100 mm, 1.7 μm) maintained at 45 °C by gradient elution with a mobile phase of 0.1% (v/v) aqueous formic acid–acetonitrile. By applying a multiple reaction monitoring method, we rapidly determined the various analytes simultaneously. The coefficient of determination of the regression equation prepared in the tested concentration range of each authentic reference standard was ≥0.9950 and showed good linearity. The accuracy ranged from 84.23% to 115.47%, and the relative standard deviation values for intra- and interday precisions ranged from 0.84% to 9.57%, respectively. Analysis of OCE samples using this method showed that they contained up to 27.10 mg/g of active ingredients. The method can provide data to improve the consistency and, thus, the future quality of OCE preparations and other traditional herbal formulas. Full article
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