scholarly journals Comparison of Different Types of SPME Arrow Sorbents to Analyze Volatile Compounds in Cirsium setidens Nakai

Foods ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 785 ◽  
Author(s):  
Su-Jeong Kim ◽  
Jun-Young Lee ◽  
Yun-Sang Choi ◽  
Jung-Min Sung ◽  
Hae Won Jang
Keyword(s):  
Volatile Compounds ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Perennial Plant ◽  
High Affinity ◽  
Freeze Dried ◽  
Wide Range ◽  
Anti Cancer ◽  
Different Types ◽  
Cirsium Setidens

Cirsium setidens Nakai is a perennial plant extensively used as food in Korea. Various reports have illustrated the presence of phytochemicals with antioxidant, anti-cancer, anti-tumor, and anti-inflammatory activities; however, little is known about the volatile compounds present in this plant. Here, a novel solid-phase microextraction (SPME) Arrow method was performed to extract and analyze volatile compounds from freeze-dried Cirsium setidens Nakai. Four types of SPME Arrows coated with films, such as carbon wide range/polydimethylsiloxane, divinylbenzene/polydimethylsiloxane, polydimethylsiloxane, and polyacrylate were evaluated to identify the most suitable Arrow. The carbon wide range/polydimethylsiloxane Arrow was found to exhibit high affinity for the volatile compounds present in Cirsium setidens Nakai. A total of 58 volatile compounds were identified. The major compounds were 2-Pentylfuran, 1-Methylcycloheptanol, 1-Penten-3-ol, 2,2,4,6,6-Pentamethylheptane, 2,3,6,7-Tetramethyloctane, 5-Ethyl-2,2,3-trimethylheptane, 3,5-Octadien-2-one, β-Cyclocitral, and trans-β-Ionone. The present study demonstrates that the SPME Arrow coated with the carbon wide range/polydimethylsiloxane film is suitable for the analytical profiling of volatile compounds present in Cirsium setidens Nakai.

scholarly journals Sealing effectiveness of different types of closures towards volatile phenols and haloanisoles

OENO One ◽  
2013 ◽  
Vol 47 (2) ◽  
pp. 145 ◽  
Author(s):  
Bruno Pereira ◽  
Paulo Lopes ◽  
Juliana Marques ◽  
Maria Pimenta ◽  
Cátia Alves ◽  
...  
Keyword(s):  
Volatile Compounds ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Labeled Compounds ◽  
Volatile Phenols ◽  
Effective Barrier ◽  
Different Types ◽  
Practical Information ◽  
Cork Stoppers

<p style="text-align: justify;"><strong>Aim</strong>: To determine if aerial contamination can induce the migration of volatile compounds through wine closures after bottling.</p><p style="text-align: justify;"><strong>Methods and results</strong>: Bottled white wines sealed with cork stoppers (natural and microagglomerate), synthetic closures and screw caps were stored under an environment contaminated with three deuterium-labeled compounds : (d<sub>5</sub>)-2,4,6-trichloroanisole (d<sub>5</sub>-TCA), (d<sub>4</sub>)-4-ethylphenol (d<sub>4</sub>-E4P) and (d<sub>5</sub>)-4-ethylguaiacol (d<sub>5</sub>-E4G). Wines, closure sections (outer, middle and inner) and screw cap liner were assessed over time for the concentration of different compounds by solid phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS). The results collected during 30 months of storage showed that large amounts of all compounds were essentially retained in the outer portion of cylindrical closures, both cork and synthetic. However, these compounds were able to penetrate through synthetics and screw caps and contaminate the wine.</p><p style="text-align: justify;"><strong>Conclusion</strong>: Cork stoppers have proven to be an effective barrier to the migration of aerial volatile compounds such as d<sub>5</sub>-TCA, d<sub>4</sub>-E4P and d<sub>5</sub>-E4G, whereas permeable closures such as synthetic and screwcap saranex did allow the migration of those compounds into bottled wines.</p><p style="text-align: justify;"><strong>Significance and impact of the study</strong>: This study provides practical information about the sealing properties of different closures for a sound decision-making with regard to packaging. To the best of our knowledge, this is the first report of post-bottling aerial contamination via migration of volatile compounds through wine closures.</p>

Analysis of Volatile Compound from Commercial Swiftlet Aroma Using Solid-Phase Microextraction Gas Chromatography-Mass Spectrometry (SPME-GC-MS)

2021 ◽  
Vol 1025 ◽  
pp. 122-127
Author(s):  
Nik Fatin Nabilah binti Muhammad Nordin ◽  
Che Mohd Aizal bin Che Mohd ◽  
Saiful Nizam bin Tajuddin
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Volatile Compounds ◽  
Volatile Compound ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Natural Substances ◽  
Chromatography Mass Spectrometry ◽  
Different Types

This study was designed to investigate the compounds in the different types of commercial aroma used to attract swiftlets in the birdhouse. Analysis of the volatile compounds is done on two types of commercial aroma, which is categorized as floor aroma (F1, F2, F3) and top aroma (T1, T2, T3) using SPME-GC-MS. As a result, F1, F2 and F3 shows the presence of major constituents like 2-heptanone (13.53%, 3.22% and 0.37% respectively) and 2-nonanone (0.83%, 2.02%, and 0.82% respectively) using DB-1ms while 2-heptanone (5.87%, 0.78% and 0.45% respectively) and methoxy-phenyl-oxime (11.50%, 11.84% and 0.20% respectively) using DB-wax. Major constituents detected using DB-1ms for T1, T2 and T3 are 1-(2-methoxy-1-methylethoxy)-2-propanol (36.49%, 16.23% and 3.06% respectively). Meanwhile, no similar compounds detected by DB-wax for sample T1, T2 and T3. The overall findings concluded that most of the formulation used in the commercial aroma contained strong odor-producing chemicals to attract swiftlets. More studies should be done on investigating the effects of the commercial aroma towards swiftlet also on aroma made from natural substances instead of chemically produced commercial aroma.

scholarly journals A high-throughput and sensitive methodology for the quantification of urinary 8-hydroxy-2′-deoxyguanosine: measurement with gas chromatography-mass spectrometry after single solid-phase extraction

2004 ◽  
Vol 380 (2) ◽  
pp. 541-548 ◽  
Author(s):  
Hai-Shu LIN ◽  
Andrew M. JENNER ◽  
Choon Nam ONG ◽  
Shan Hong HUANG ◽  
Matthew WHITEMAN ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Extraction ◽  
Healthy Subjects ◽  
Solid Phase ◽  
Large Population ◽  
Urine Samples ◽  
Gas Chromatography Mass Spectrometry ◽  
Phase Extraction ◽  
Freeze Dried ◽  
Wide Range

8-Hydroxy-2´-deoxyguanosine (8OHdG) is a widely used biomarker for the measurement of endogenous oxidative DNA damage. A sensitive method for the quantification of 8OHdG in urine by single solid-phase extraction and GC-MS (gas chromatography with MS detection) using selective ion monitoring is described in the present study. After solid-phase extraction, samples are freeze-dried, derivatized by trimethylsilylation and analysed by GC-MS. The urinary 8OHdG was quantified using heavy isotope dilution with [18O]8OHdG. The recovery of 8OHdG after the solid-phase extraction ranged from 70 to 80% for a wide range of urinary 8OHdG levels. Using 1 ml of urine, the limit of quantification was >2.5 nM (2.5 pmol/ml) and the calibration curve was linear in the range 2.5–200 nM. This method was applied to measure 8OHdG in urine samples from 12 healthy subjects. The intra- and inter-day variations were <9%. Urinary 8OHdG levels in spot urine samples from four healthy subjects were also measured for 1 week and, again, the variation was small. The presence of H2O2 in urine did not cause artifactual formation of 8OHdG. Since this assay is simple, rapid, sensitive and reproducible, it seems suitable to be used as a routine methodology for the measurement of urinary excretion of 8OHdG in large population studies.

Determining Chemical Activity of (Semi)volatile Compounds by Headspace Solid-Phase Microextraction

2007 ◽  
Vol 79 (7) ◽  
pp. 2869-2876 ◽  
Author(s):  
Charlotte N. Legind ◽  
Ulrich Karlson ◽  
Joel G. Burken ◽  
Fredrik Reichenberg ◽  
Philipp Mayer
Keyword(s):  
Volatile Compounds ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Chemical Activity ◽  
Headspace Solid Phase Microextraction
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