scholarly journals Acetone as Indicator of Lipid Oxidation in Stored Margarine

Antioxidants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 59
Author(s):  
Sarah Fruehwirth ◽  
Sandra Egger ◽  
Thomas Flecker ◽  
Miriam Ressler ◽  
Nesrin Firat ◽  
...  
Keyword(s):  
Lipid Oxidation ◽  
Oxidative Stability ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Conjugated Dienes ◽  
Gas Chromatography Mass Spectrometry ◽  
Lipid Oxidation Product ◽  
Different Types ◽  
Oxidized Triacylglycerols ◽  
First Time

Margarine contains a minimum of 80% fat and is therefore prone to lipid oxidation. While lipid oxidation in vegetable oils and o/w emulsions has been thoroughly investigated, studies about the oxidative stability and the identification of potential indicators of lipid oxidation in margarine are scarce. To evaluate the oxidative stability and to indicate the progress of lipid oxidation, four different types of industrial margarine (M1–M4), which differed in their composition of the minor ingredients and the oil phase, were stored at 15 °C for 180 days and analyzed at days 0, 1, 7, 14, 28, 56, 99, and 180 regarding peroxides, conjugated dienes, oxidized triacylglycerols, and volatiles. The peroxide value and the conjugated dienes increased up to 4.76 ± 0.92 meq O2/kg oil and 14.7 ± 0.49 in M2, respectively. The oxidative stability decreased by a maximum of 50.9% in M4. We detected three different epoxidized triglycerides—TAG54:1 (O), TAG54:2 (O) and TAG54:3 (O)—in M3. Acetone could be identified, for the first time, as lipid oxidation product in stored margarine by headspace-solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS). It increased in all types of margarine during storage by a maximum of 1070 ppb in M2. Acetone might be used as a new indicator for lipid oxidation in margarine.

scholarly journals Effect of Omega-3 Microcapsules Addition on the Profile of Volatile Compounds in Enriched Dry-Cured and Cooked Sausages

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1683
Author(s):  
Juan Carlos Solomando ◽  
Teresa Antequera ◽  
Alberto Martín ◽  
Trinidad Perez-Palacios
Keyword(s):  
Lipid Oxidation ◽  
Volatile Compounds ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Oxidation Stability ◽  
Meat Products ◽  
Oxidation Products ◽  
Gas Chromatography Mass Spectrometry ◽  
Omega 3 ◽  
Meat Samples

The main goal of the present study was evaluating the effect of enriching meat products (cooked (C-SAU) and dry-cured sausages (D-SAU)) with monolayered (Mo) and multilayered (Mu) fish oil microcapsules on the profile of volatile compounds, with special interest in lipid oxidation markers. For that, Solid-Phase Microextraction (SPME) and Gas Chromatography-Mass Spectrometry (GC-MS) were used. Significant differences were found in the volatile compound profile between Mo and Mu, which was been reflected in the meat samples. Thus, in general, volatile compounds from lipid oxidation have shown higher abundance in Mo and C-SAU and D-SAU enriched with this type of microcapsule, indicating that the wall of Mu (chitosan-maltodextrine) might protect the encapsulated bioactive compounds more effectively than that of Mo (maltodextrine). However, this finding is not reflected in the results of previous studies evaluating the sensory perception and oxidation stability of C-SAU and D-SAU, but it should be considered since unhealthy oxidation products can be formed in the enriched meat products with Mo. Thus, the addition of Mu as an omega-3 vehicle for enriching meat products may be indicated.

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>

scholarly journals Quantification of VOC Emissions from Carbonized Refuse-Derived Fuel Using Solid-Phase Microextraction and Gas Chromatography-Mass Spectrometry

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3208 ◽  
Author(s):  
Andrzej Białowiec ◽  
Monika Micuda ◽  
Antoni Szumny ◽  
Jacek Łyczko ◽  
Jacek Koziel
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Municipal Waste ◽  
Gas Chromatography Mass Spectrometry ◽  
Voc Emissions ◽  
Chromatography Mass Spectrometry ◽  
Refuse Derived Fuel ◽  
First Time

In this work, for the first time, the volatile organic compound (VOC) emissions from carbonized refuse-derived fuel (CRDF) were quantified on a laboratory scale. The analyzed CRDF was generated from the torrefaction of municipal waste. Headspace solid-phase microextraction (SPME) and gas chromatography-mass spectrometry (GC-MS) was used to identify 84 VOCs, including many that are toxic, e.g., derivatives of benzene or toluene. The highest emissions were measured for nonanal, octanal, and heptanal. The top 10 most emitted VOCs contributed to almost 65% of the total emissions. The VOC mixture emitted from torrefied CRDF differed from that emitted by other types of pyrolyzed biochars, produced from different types of feedstock, and under different pyrolysis conditions. SPME was a useful technology for surveying VOC emissions. Results provide an initial database of the types and relative quantities of VOCs emitted from CRDF. This data is needed for further development of CRDF technology and comprehensive assessment of environmental impact and practical storage, transport, and potential adoption of CRDF as means of energy and resource recovery from municipal waste.

scholarly journals An Analysis of Volatile Components of the Liverworts Dumortiera hirsuta subsp. hirsuta and Dumortiera hirsuta subsp. nepalensis (Dumortieraceae) from Panama and Taxonomic Observations on the Species

2018 ◽  
Vol 13 (8) ◽  
pp. 1934578X1801300 ◽  
Author(s):  
Armando A. Durant-Archibold ◽  
Noris Salazar Allen ◽  
Anette Garrido ◽  
Jose Gudiño Ledezma ◽  
Mahabir P. Gupta
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Chemical Markers ◽  
Headspace Solid Phase Microextraction ◽  
First Time

We report for the first time the chemical composition of volatile components (VOCs) of two subspecies, D. hirsuta subsp. hirsuta and D. hirsuta subsp. nepalensis, of the liverwort Dumortiera hirsuta from Panama by using headspace-solid phase microextraction-gas chromatography-mass spectrometry in order to assess distinguishing markers between the two species. Forty VOCs were identified in total for both subspecies. Of these, 34 are reported for the first time in D. hirsuta. Furthermore, both subspecies showed clear differences in the type and amount of VOCs. The major compounds in D. hirsuta subsp. hirsuta were α-gurjunene, β-selinene, α-guaiene, α-humulene and β-caryophyllene; while in D. hirsuta subsp. nepalensis were ledene, α-gurjunene, β-caryophyllene and α-guaiene, respectively. Two oxygenated sesquiterpenes, globulol and nerolidol, could be considered as possible distinguishing chemical markers between these two subspecies. We conclude that both morphotypes of D. hirsuta are chemically different.

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.

Application of gas chromatography-mass spectrometry and chemometrics methods for assessing volatile profiles of Pu-erh tea with different processing methods and ageing years

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 87806-87817 ◽  
Author(s):  
Shidong Lv ◽  
Yuanshuang Wu ◽  
Jifu Wei ◽  
Ming Lian ◽  
Chen Wang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Multivariate Statistical Methods ◽  
Multivariate Statistical ◽  
Chromatography Mass Spectrometry ◽  
Different Types ◽  
Volatile Profiles

A method was developed based on head-space solid phase microextraction/gas chromatography-mass spectrometry (HS-SPME/GC-MS) combined with multivariate statistical methods to assess volatile profiles in different types of Pu-erh teas.

scholarly journals Chemical Profiling of Volatile Components of the Gametophyte and Sporophyte Stages of the Hornwort Leiosporoceros dussii (Leiosporocerotaceae) From Panama by HS-SPME-GC-MS

2019 ◽  
Vol 14 (8) ◽  
pp. 1934578X1986887
Author(s):  
Anette Garrido ◽  
Jose Gudiño Ledezma ◽  
Armando A. Durant-Archibold ◽  
Noris Salazar Allen ◽  
Juan Carlos Villarreal A ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Chemical Constituents ◽  
Gas Chromatography Mass Spectrometry ◽  
Bornyl Acetate ◽  
Volatile Components ◽  
Chemical Markers ◽  
Chemical Profiling ◽  
Volatile Organic ◽  
First Time

We report for the first time the chemical profiling of volatile organic compounds (VOCs) of gametophyte and sporophyte life stages of Leiosporoceros dussii, from Panama by using headspace-solid phase microextraction-gas chromatography-mass spectrometry in order to assess distinguishing chemical markers between the male and female gametophytes, and sporophytes of this hornwort. A total of 27 VOCs were identified in L. dussii. Furthermore, the gametophyte and sporophyte showed clear differences in the type and amount of VOCs. The main constituents of L. dussii female thalli were menthacamphor (17.8%), hexanol (12.3%), and menthyl acetate (12.3%), while the major compounds of the male thalli were hexanol (25.3%), β-ionone (21.1%), benzeneacetaldehyde (17.6%), and β-cyclocitral (14.0%). The main VOCs of the sporophytes were hexanal (19.3%), β-cyclocitral (17.6%), 2-nonenal (15.8%), hexanol (12.5%), and β-ionone (10.2%). Unique compounds found in the female thalli were 3-pentanone, 3-octenol, nonanol, estragole, and menthyl acetate, and in the male thalli were methyl heptenone, nonanal, neoisomenthol, and bornyl acetate. Isomenthol, thymol, isomenthol acetate, and β-methylnaphthalene were only found in the sporophyte. The characteristic VOCs identified in L. dussii suggest a difference between the chemical constituents of L. dussii and other hornworts species. The presence of simple VOCs when compared with compounds previously characterized in another hornwort genera may support the distinct genetic nature of this species.

The Optimization and HS-SPME/GC-MS Analysis in Pear Fruit

2014 ◽  
Vol 1033-1034 ◽  
pp. 762-766 ◽  
Author(s):  
Guo Peng Li ◽  
Li Jing Lin ◽  
Jun Zhao ◽  
Ji Hua Li
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Extraction Time ◽  
Gas Chromatography Mass Spectrometry ◽  
Extraction Temperature ◽  
Pear Fruit ◽  
Volatile Analysis ◽  
Different Types

Solid-phase microextraction (SPME) is a rapid sample preparation in volatile analysis. The aromatic volatile compositions of ‘Kuerle’ were analyzed using SPME and gas chromatography-mass spectrometry (GC-MS). The effect of different types of fibers, extraction time, and extraction temperature on the volatile results were compared and discussed. The results were as followed. Results showed that 65μm PDMS/DVB fiber had the best effect of extraction. The optimum factors such as extraction time and temperature were 45 min and 40°C.

Sign in / Sign up

Export Citation Format

Share Document