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Bizzo HR, Brilhante NS, Nolvachai Y, Marriott PJ. Use and abuse of retention indices in gas chromatography. J Chromatogr A 2023; 1708:464376. [PMID: 37717451 DOI: 10.1016/j.chroma.2023.464376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/07/2023] [Accepted: 09/09/2023] [Indexed: 09/19/2023]
Abstract
The value of the concept of retention indices (RI) to the practice of gas chromatography (GC) is highlighted, where the RI of a compound is one component of the strategy to identify the compound. The widespread reliance on GC and then on mass spectrometry for 'identification', may result in inadequate confirmation of molecular identity. However, RI do provide a useful tentative indication of the possible molecule(s). Thus, the RI value is a useful first measure of the molecule identity, and shown here to be valuable provided limitations are recognised. An author has a responsibility to correctly calculate the index and then use the values for (tentative) identification. Tables of reference RI values are useful in this respect, but finding an 'exact match' RI value does not confirm the identity. Hence, it is necessary to understand how the RI value may be incorrectly used in this respect. The reviewer of written research is charged with ensuring the index values are applied in a rigorous manner. Selected case studies from our own work, support the care that must be exercised when reporting RI values. In terms of advanced GC operations, mention is made of multidimensional gas chromatography and comprehensive two-dimensional gas chromatography to acquire RI values on both the first and second columns in the two-column separation experiment.
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Affiliation(s)
- Humberto R Bizzo
- Embrapa Agroindústria de Alimentos - Avenida das Américas, 29501, Rio de Janeiro, RJ 23020-470, Brazil; Universidade Federal do Rio de Janeiro - Avenida Athos da Silveira Ramos, 149, Rio de Janeiro, RJ 21945-970, Brazil
| | - Nathália S Brilhante
- Universidade Federal do Rio de Janeiro - Avenida Athos da Silveira Ramos, 149, Rio de Janeiro, RJ 21945-970, Brazil
| | - Yada Nolvachai
- CASS Food Research Centre, School of Exercise and Nutritional Sciences, Faculty of Health, Deakin University, Burwood 3125, Victoria, Australia
| | - Philip J Marriott
- Australian Centre for Research on Separation Science, School of Chemistry, Monash University, Wellington Road, Clayton, VIC 3800, Australia.
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Unveiling Chemical Cues of Insect-Tree and Insect-Insect Interactions for the Eucalyptus Weevil and Its Egg Parasitoid by Multidimensional Gas Chromatographic Methods. Molecules 2022; 27:molecules27134042. [PMID: 35807301 PMCID: PMC9268296 DOI: 10.3390/molecules27134042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/17/2022] [Accepted: 06/17/2022] [Indexed: 02/01/2023] Open
Abstract
Multidimensional gas chromatography is, presently, an established and powerful analytical tool, due to higher resolving power than the classical 1D chromatographic approaches. Applied to multiple areas, it allows to isolate, detect and identify a larger number of compounds present in complex matrices, even in trace amounts. Research was conducted to determine which compounds, emitted by host plants of the eucalyptus weevil, Gonipterus platensis, might mediate host selection behavior. The identification of a pheromone blend of G. platensis is presented, revealing to be more attractive to weevils of both sexes, than the individual compounds. The volatile organic compounds (VOCs) were collected by headspace solid phase microextraction (HS-SPME), MonoTrapTM disks, and simultaneous distillation-extraction (SDE). Combining one dimensional (1D) and two-dimensional (2D) chromatographic systems—comprehensive and heart-cut two-dimensional gas chromatography (GC×GC and H/C-MD-GC, respectively) with mass spectrometry (MS) and electroantennographic (EAD) detection, enabled the selection and identification of pertinent semiochemicals which were detected by the insect antennal olfactory system. The behavioral effect of a selected blend of compounds was assessed in a two-arm olfactometer with ten parallel walking chambers, coupled to video tracking and data analysis software. An active blend, composed by cis and trans-verbenol, verbenene, myrtenol and trans-pinocarveol was achieved.
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Almeida Santos CV, da Silva MG, Cabrita MJ. Volatile profile of two monovarietal white wines under different antioxidant environments during storage in bottle. CIÊNCIA E TÉCNICA VITIVINÍCOLA 2022. [DOI: 10.1051/ctv/ctv20223701039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
The volatile organic compounds (VOCs) formed during winemaking can be modulated by several additives, namely by the use of sulphur dioxide (SO2) which has been well-accepted on winemaking as a preservative agent. However, some drawbacks associated with SO2 wine application led to the need to reduce or replace its use. In this work, VOCs profile after storage in bottle under different antioxidant conditions of two Portuguese monovarietal wines (‘Arinto’ and ‘Síria’) was studied. Wines were obtained by different winemaking environments (0, 50, 100 mg/L of SO2 and 100 mg/L ascorbic acid for ‘Síria’ and 15, 30, 45 mg/L of SO2 and 100 mg/L of ascorbic acid for ‘Arinto’ both with and without bentonite). After alcoholic fermentation, a second SO2 treatment was applied: 0 and 60 mg/L of SO2 to ‘Arinto’ wines and 30 and 60 mg/L of SO2 to ‘Síria’ wines. Wines were kept over lees for three months, bottled and analysed after three months in bottle. The VOCs present were analysed by HS-SPME-GC/MS six months after fermentation. The maturation conditions did not influence the evolution of free and total SO2. Regarding the VOCs profile evolution, the ANOVA analysis showed that esters are the most important group, presenting significant differences among samples. Through the PCA analysis, using wines after fermentation as reference, 74.13 % and 54.92 % of the variation were explained by the first two principal components for ‘Arinto’ and ‘Síria’, respectively. VOCs profile evolution of wines seems to be mainly influenced by the fermentation conditions.
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Ferreira IM, Freitas F, Pinheiro S, Mourão MF, Guido LF, Gomes da Silva M. Impact of temperature during beer storage on beer chemical profile. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112688] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Saracino F, Brinco J, Gago D, Gomes da Silva M, Boavida Ferreira R, Ricardo-da-Silva J, Chagas R, Ferreira LM. DCMC as a Promising Alternative to Bentonite in White Wine Stabilization. Impact on Protein Stability and Wine Aromatic Fraction. Molecules 2021; 26:6188. [PMID: 34684769 PMCID: PMC8539232 DOI: 10.3390/molecules26206188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/29/2021] [Accepted: 10/11/2021] [Indexed: 11/29/2022] Open
Abstract
Protein haze in white wine is one of the most common non-microbial defects of commercial wines, with bentonite being the main solution utilized by the winemaking industry to tackle this problem. Bentonite presents some serious disadvantages, and several alternatives have been proposed. Here, an alternative based on a new cellulose derivative (dicarboxymethyl cellulose, DCMC) is proposed. To determine the efficiency of DCMC as a bentonite alternative, three monovarietal wines were characterized, and their protein instability and content determined by a heat stability test (HST) and the Bradford method, respectively. The wines were treated with DCMC to achieve stable wines, as shown by the HST, and the efficacy of the treatments was assessed by determining, before and after treatment, the wine content in protein, phenolic compounds, sodium, calcium, and volatile organic compounds (VOCs) as well as the wine pH. DCMC applied at dosages such as those commonly employed for bentonite was able to reduce the protein content in all tested wines and to stabilize all but the Moscatel de Setúbal varietal wine. In general, DCMC was shown to induce lower changes in the wine pH and phenolic content than bentonite, reducing the wine calcium content. Regarding which VOCs are concerned, DCMC produced a general impact similar to that of bentonite, with differences depending on wine variety. The results obtained suggest that DCMC can be a sustainable alternative to bentonite in protein white wine stabilization.
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Affiliation(s)
- Francesco Saracino
- LEAF—Linking Landscape, Environment, Agriculture and Food Research Center, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal; (F.S.); (R.B.F.); (J.R.-d.-S.)
| | - João Brinco
- CENSE—Center for Environmental and Sustainability Research, NOVA School of Science and Technology, NOVA University of Lisbon, 2829-516 Caparica, Portugal;
| | - Diana Gago
- LAQV-REQUIMTE, Departamento de Química, NOVA School of Science and Technology, 2829-516 Caparica, Portugal; (D.G.); (M.G.d.S.); (R.C.)
| | - Marco Gomes da Silva
- LAQV-REQUIMTE, Departamento de Química, NOVA School of Science and Technology, 2829-516 Caparica, Portugal; (D.G.); (M.G.d.S.); (R.C.)
| | - Ricardo Boavida Ferreira
- LEAF—Linking Landscape, Environment, Agriculture and Food Research Center, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal; (F.S.); (R.B.F.); (J.R.-d.-S.)
| | - Jorge Ricardo-da-Silva
- LEAF—Linking Landscape, Environment, Agriculture and Food Research Center, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal; (F.S.); (R.B.F.); (J.R.-d.-S.)
| | - Ricardo Chagas
- LAQV-REQUIMTE, Departamento de Química, NOVA School of Science and Technology, 2829-516 Caparica, Portugal; (D.G.); (M.G.d.S.); (R.C.)
- Food4Sustainability—Associação Para a Inovação no Alimento Sustentável, Centro Empresarial de Idanha-a-Nova, Zona Industrial, 6060-182 Idanha-a-Nova, Portugal
| | - Luísa Maria Ferreira
- LAQV-REQUIMTE, Departamento de Química, NOVA School of Science and Technology, 2829-516 Caparica, Portugal; (D.G.); (M.G.d.S.); (R.C.)
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6
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Pereira C, Mendes D, Dias T, Garcia R, da Silva MG, Cabrita MJ. Revealing the yeast modulation potential on amino acid composition and volatile profile of Arinto white wines by a combined chromatographic-based approach. J Chromatogr A 2021; 1641:461991. [PMID: 33640805 DOI: 10.1016/j.chroma.2021.461991] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 01/26/2021] [Accepted: 02/10/2021] [Indexed: 12/14/2022]
Abstract
The importance of yeasts in aroma production during wine fermentation is a significant concern for obtaining a wine that appraises a broad number of consumers. For wine producers, wine aroma modulation is an essential issue where the yeasts used during the winemaking process represents a feasible way to improve the complexity and enhance wines specific characteristics. During the fermentation process of wines, yeasts convert grapes sugars into alcohol, carbon dioxide and a large number of secondary metabolites, depending on yeast metabolism, affecting the wine composition, namely its aroma and amino acids (AAs) composition. So, the present work aims to study the effect of different Saccharomyces-type yeasts on the AAs composition and volatile profile of Arinto white wines. To pursue this goal, four white wines from Arinto grapes were fermented with three different commercial yeasts (Saccharomyces bayanus EC1118, Saccharomyces cerevisiae CY3079, Saccharomyces bayanus QA23) and one Native yeast. Arinto wines AAs composition was quantified by HPLC-DAD, after a derivatization step to obtain the aminoenone derivatives. The volatile content of Arinto wines was determined by GC/MS, after an HS-SPME extraction. Results showed significant differences among the AAs content and volatile profile in the Arinto wines. The higher AAs content was found in the Arinto wines fermented with the CY3079 yeast (470.74 mg•L-1), and the lowest content of AAs in the Arinto wines fermented with EC1118 yeast (343.06 mg•L-1). Native yeast results in wines with a volatile profile richer in esters compared to the other sample wines. Principal component analysis (PCA) obtained with combined data of AAs and volatile compounds, after normalization, for each Arinto wine samples, shows a clear separation of wines fermented with Native and CY3079 yeasts in relation to QA23 and EC1118 fermented wines . The first and second principal components are responsible for 44.40% and 32.20%, respectively, of the system's variance, which clearly showed a differentiation among wines.
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Affiliation(s)
- Catarina Pereira
- MED - Mediterranean Institute for Agriculture, Environment and Development. Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Davide Mendes
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Thomas Dias
- MED - Mediterranean Institute for Agriculture, Environment and Development. Instituto de Investigação e Formação Avançada, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Raquel Garcia
- MED - Mediterranean Institute for Agriculture, Environment and Development, Departamento de Fitotecnia, Escola de Ciências e Tecnologia, Universidade de Évora, Pólo da Mitra. Ap. 94, 7006-554 Évora, Portugal
| | - Marco Gomes da Silva
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Maria João Cabrita
- MED - Mediterranean Institute for Agriculture, Environment and Development, Departamento de Fitotecnia, Escola de Ciências e Tecnologia, Universidade de Évora, Pólo da Mitra. Ap. 94, 7006-554 Évora, Portugal.
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7
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Almeida Santos CV, Gomes da Silva M, Cabrita MJ. Impact of SO2 and bentonite addition during fermentation on volatile profile of two varietal white wines. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109893] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Gaspar MC, de Sousa HC, Seabra IJ, Braga ME. Environmentally-safe scCO2 P. pinaster branches extracts: Composition and properties. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2019.11.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Ahmad Dar A, Sangwan P, Kumar A. Chromatography: An important tool for drug discovery. J Sep Sci 2019; 43:105-119. [DOI: 10.1002/jssc.201900656] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 10/25/2019] [Accepted: 11/03/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Alamgir Ahmad Dar
- Bio‐organic Chemistry DivisionCSIR‐Indian Institute of Integrative Medicine Jammu India
| | - P.L. Sangwan
- Bio‐organic Chemistry DivisionCSIR‐Indian Institute of Integrative Medicine Jammu India
| | - Anil Kumar
- Synthetic Organic Chemistry Laboratory, Faculty of SciencesShri Mata Vaishno Devi University Katra India
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Martins E, Almeida PR, Quintella BR, da Silva MG, Lança MJ. Muscle fatty acid profiles of sea lamprey (Petromyzon marinus L.) indicate the use of fast metabolized energy during ontogenesis. FISH PHYSIOLOGY AND BIOCHEMISTRY 2019; 45:849-862. [PMID: 30368685 DOI: 10.1007/s10695-018-0580-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 10/15/2018] [Indexed: 06/08/2023]
Abstract
A comprehensive characterization of muscle's FA composition of sea lamprey ammocoetes and adults was performed to test the hypothesis that larvae, and early spawning migrants have a similar FA profile prior to metamorphosis and to spawning migration. Subsequently, the role played by FA signature in these two highly demanding stages of life cycle was inferred. The results confirm that muscle represents an important fat reservoir, and the FA trophic markers revealed the importance of bacteria as sources of iso and anteiso FA and the strong trophic representation of benthic phytoplankton (diatoms) to larvae muscle FA profile. In early spawning migrants, the significance of marine food web to FA muscle profile is highlighted by the presence of FA signatures characteristics of herbivorous calanoid copepods. Although both life cycle phases studied do not share the same muscle FA signature, there is a part of the profile that is common, which is characterized by FA used in β-oxidation, such as C18:1ω9 but also by medium chain FA and PUFA which points that PUFA are spared as fuel to β-oxidation process and probably used to the development of tissues membranes (ammocoetes) and gonadal development and eicosanoid production among others (early spawning migrants). Further studies on FA profile are necessary to elucidate the FA role either during different life stages (ontogeny) or in the distinct habitats frequented (freshwater versus marine) by this diadromous species.
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Affiliation(s)
- Elói Martins
- LAQV, REQUIMTE-Faculdade de Ciências e Tecnologias, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
| | - Pedro R Almeida
- Departamento de Biologia, Escola de Ciências e Tecnologia, Universidade de Évora, 7004-516, Évora, Portugal
- MARE-Centro de Ciências do Mar e do Ambiente, Universidade de Évora, 7004-516, Évora, Portugal
| | - Bernardo R Quintella
- MARE-Centro de Ciências do Mar e do Ambiente, Universidade de Évora, 7004-516, Évora, Portugal
- Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
| | - Marco Gomes da Silva
- LAQV, REQUIMTE-Faculdade de Ciências e Tecnologias, Universidade Nova de Lisboa, 2829-516, Caparica, Portugal
| | - Maria João Lança
- Departamento de Zootecnia, Escola de Ciências e Tecnologia, Universidade de Évora, 7004-516, Évora, Portugal.
- ICAAM-Instituto de Ciências Agrárias e Ambientais Mediterrânicas, Departamento de Zootecnia, Escola de Ciências e Tecnologia da Universidade de Évora, Largo dos Colegiais 2, 7004-516, Évora, Portugal.
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Lebanov L, Tedone L, Kaykhaii M, Linford MR, Paull B. Multidimensional Gas Chromatography in Essential Oil Analysis. Part 2: Application to Characterisation and Identification. Chromatographia 2018. [DOI: 10.1007/s10337-018-3651-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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12
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Multidimensional Gas Chromatography in Essential Oil Analysis. Part 1: Technical Developments. Chromatographia 2018. [DOI: 10.1007/s10337-018-3649-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Martins N, Garcia R, Mendes D, Costa Freitas AM, da Silva MG, Cabrita MJ. An ancient winemaking technology: Exploring the volatile composition of amphora wines. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.05.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Belinato JR, Dias FFG, Caliman JD, Augusto F, Hantao LW. Opportunities for green microextractions in comprehensive two-dimensional gas chromatography / mass spectrometry-based metabolomics - A review. Anal Chim Acta 2018; 1040:1-18. [PMID: 30327098 DOI: 10.1016/j.aca.2018.08.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 08/15/2018] [Accepted: 08/17/2018] [Indexed: 10/28/2022]
Abstract
Microextractions have become an attractive class of techniques for metabolomics. The most popular technique is solid-phase microextraction that revolutionized the field of modern sample preparation in the early nineties. Ever since this milestone, microextractions have taken on many principles and formats comprising droplets, fibers, membranes, needles, and blades. Sampling devices may be customized to impart exhaustive or equilibrium-based characteristics to the extraction method. Equilibrium-based approaches may rely on additional methods for calibration, such as diffusion-based or on-fiber kinetic calibration to improve bioanalysis. In addition, microextraction-based methods may enable minimally invasive sampling protocols and measure the average free concentration of analytes in heterogeneous multiphasic biological systems. On-fiber derivatization has evidenced new opportunities for targeted and untargeted analysis in metabolomics. All these advantages have highlighted the potential of microextraction techniques for in vivo and on-site sampling and sample preparation, while many opportunities are still available for laboratory protocols. In this review, we outline and discuss some of the most recent applications using microextractions techniques for comprehensive two-dimensional gas chromatography-based metabolomics, including potential research opportunities.
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Affiliation(s)
- João R Belinato
- Institute of Chemistry, University of Campinas, Campinas, SP, 13083-970, Brazil; National Institute of Science and Technology in Bioanalysis (INCTBio), Campinas, SP, 13083-970, Brazil
| | - Fernanda F G Dias
- Institute of Chemistry, University of Campinas, Campinas, SP, 13083-970, Brazil; National Institute of Science and Technology in Bioanalysis (INCTBio), Campinas, SP, 13083-970, Brazil
| | - Jaqueline D Caliman
- Institute of Chemistry, University of Campinas, Campinas, SP, 13083-970, Brazil; National Institute of Science and Technology in Bioanalysis (INCTBio), Campinas, SP, 13083-970, Brazil
| | - Fabio Augusto
- Institute of Chemistry, University of Campinas, Campinas, SP, 13083-970, Brazil; National Institute of Science and Technology in Bioanalysis (INCTBio), Campinas, SP, 13083-970, Brazil
| | - Leandro W Hantao
- Institute of Chemistry, University of Campinas, Campinas, SP, 13083-970, Brazil.
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Tahri K, Duarte AA, Carvalho G, Ribeiro PA, da Silva MG, Mendes D, El Bari N, Raposo M, Bouchikhi B. Distinguishment, identification and aroma compound quantification of Portuguese olive oils based on physicochemical attributes, HS-GC/MS analysis and voltammetric electronic tongue. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:681-690. [PMID: 28671261 DOI: 10.1002/jsfa.8515] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/20/2017] [Accepted: 06/26/2017] [Indexed: 05/21/2023]
Abstract
BACKGROUND In this paper, various extra-virgin and virgin olive oils samples from different Portuguese markets were studied. For this purpose, a voltammetric electronic tongue (VE-tongue), consisting of two kinds of working electrode within the array, together with physicochemical analysis and headspace gas chromatography coupled with mass spectrometry (HS-GC-MS), were applied. In addition, preliminary considerations of relationships between physicochemical parameters and multisensory system were reported. RESULTS The physicochemical parameters exhibit significant differences among the analyzed olive oil samples that define its qualities. Regarding the aroma profile, 14 volatile compounds were characterized using HS-GC-MS; among these, hex-2-enal, hexanal, acetic acid, hex-3-ene-1-ol acetate and hex-3-en-1-ol were semi-quantitatively detected as the main aroma compounds in the analyzed samples. Moreover, pattern recognition methods demonstrate the discrimination power of the proposed VE-tongue system. The results reveal the VE-tongue's ability to classify olive oil samples and to identify unknown samples based of built models. In addition, the correlation between VE-tongue and physicochemical analysis exhibits a remarkable prediction model aimed at anticipating carotenoid content. CONCLUSION The preliminary results of this investigation indicate that physicochemical and HS-GC-MS analysis, together with multisensory system coupled with chemometric techniques, presented a satisfactory performance regarding olive oil sample discrimination and identification. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Khalid Tahri
- Sensor Electronic and Instrumentation Group, Physics Department, Faculty of Sciences, Moulay Ismaïl University, Zitoune, Meknes, Morocco
- Biotechnology Agroalimentary and Biomedical Analysis Group, Biology Department, Faculty of Sciences, Moulay Ismaïl University, Zitoune, Meknes, Morocco
| | - Andreia A Duarte
- CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, UNL, Caparica, Portugal
| | - Gonçalo Carvalho
- CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, UNL, Caparica, Portugal
| | - Paulo A Ribeiro
- CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, UNL, Caparica, Portugal
| | - Marco Gomes da Silva
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, UNL, Caparica, Portugal
| | - Davide Mendes
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, UNL, Caparica, Portugal
| | - Nezha El Bari
- Biotechnology Agroalimentary and Biomedical Analysis Group, Biology Department, Faculty of Sciences, Moulay Ismaïl University, Zitoune, Meknes, Morocco
| | - Maria Raposo
- CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, UNL, Caparica, Portugal
| | - Benachir Bouchikhi
- Sensor Electronic and Instrumentation Group, Physics Department, Faculty of Sciences, Moulay Ismaïl University, Zitoune, Meknes, Morocco
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ben Hammouda I, Freitas F, Ammar S, Da Silva MG, Bouaziz M. Comparison and characterization of volatile compounds as markers of oils stability during frying by HS–SPME-GC/MS and Chemometric analysis. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1068-1069:322-334. [DOI: 10.1016/j.jchromb.2017.10.063] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 10/21/2017] [Accepted: 10/31/2017] [Indexed: 10/18/2022]
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17
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Weerapreeyakul N, Machana S, Barusrux S. Synergistic effects of melphalan and Pinus kesiya Royle ex Gordon (Simaosong) extracts on apoptosis induction in human cancer cells. Chin Med 2016; 11:29. [PMID: 27366203 PMCID: PMC4928253 DOI: 10.1186/s13020-016-0103-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Accepted: 06/21/2016] [Indexed: 12/19/2022] Open
Abstract
Background This study aims to determine the synergistic effects of the chemotherapeutic drug melphalan and the phytoconstituents extracted from Pinus kesiya Royle ex Gordon (Simaosong) in human cancer cells. Methods P. kesiya twigs extracted from 50 % ethanol–water were evaluated alone (6–500 µg/mL) and in combination with melphalan (0.75–15 µg/mL). The cytotoxic effects of single extract or extract and melphalan combination were examined by a neutral red assay to investigate their antiproliferative and apoptosis induction effects in the U937 and HepG2 cell lines. Nuclei morphological change and DNA fragmentation were examined by DNA nuclei staining with 4´6-diamidino-2-phenylindole (DAPI) and agarose gel electrophoresis, respectively. The chemical constituents of the P. kesiya extract were assessed using gas chromatography–mass spectrometry (GC–MS) analysis. The synergistic effects of different IC50 ratios of the P. kesiya extract and melphalan combination were analyzed in each cancer cell line. The dose reduction index (DRI) was calculated to determine the extent of concentration reduction in the combination treatment compared with the concentration of each single treatment. Results The IC50 ratios for melphalan to P. kesiya extract that caused 75 % antiproliferation could be reduced after combination. This response was greater in the U937 cells than in the HepG2 cells (all P < 0.001). Melphalan and P. kesiya extract had a similar effect on apoptosis induction both singly and in combination. P. kesiya extract synergized the antiproliferation and apoptosis induction effects of melphalan. Conclusions Combining the P. kesiya extract with melphalan reduced toxicity while retaining the therapeutic efficacy of melphalan.
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Affiliation(s)
| | | | - Sahapat Barusrux
- Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, 40002 Thailand
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Characterization of the essential oils of two species of Piperaceae by one- and two-dimensional chromatographic techniques with quadrupole mass spectrometric detection. Microchem J 2014. [DOI: 10.1016/j.microc.2014.02.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Dawidowicz AL, Czapczyńska NB, Wianowska D. Relevance of the Sea Sand Disruption Method (SSDM) for the Biometrical Differentiation of the Essential-Oil Composition from Conifers. Chem Biodivers 2013; 10:241-50. [DOI: 10.1002/cbdv.201200001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Indexed: 11/12/2022]
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Affiliation(s)
- Claudia Turek
- Dept. of Research and Development; WALA Heilmittel GmbH; Dorfstrasse 1; D-73087; Bad Boll/Eckwälden; Germany
| | - Florian C. Stintzing
- Dept. of Research and Development; WALA Heilmittel GmbH; Dorfstrasse 1; D-73087; Bad Boll/Eckwälden; Germany
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Bucar F, Wube A, Schmid M. Natural product isolation – how to get from biological material to pure compounds. Nat Prod Rep 2013; 30:525-45. [DOI: 10.1039/c3np20106f] [Citation(s) in RCA: 229] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Ratola N, Herbert P, Alves A. Microwave-assisted headspace solid-phase microextraction to quantify polycyclic aromatic hydrocarbons in pine trees. Anal Bioanal Chem 2012; 403:1761-9. [PMID: 22476787 DOI: 10.1007/s00216-012-5962-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 03/04/2012] [Accepted: 03/20/2012] [Indexed: 11/24/2022]
Abstract
A methodology for the extraction and quantification of 16 polycyclic aromatic hydrocarbons (PAHs) based on microwave-assisted extraction coupled with headspace solid-phase microextraction followed by gas chromatography/mass spectroscopy was validated for needles and bark of two pine species (Pinus pinaster Ait. and Pinus pinea L.). The limits of detection were below 0.92 ng g(-1) (dry weight) for needles and below 0.43 ng g(-1) (dw) for bark. Recovery assays were performed with two sample masses spiked at three levels and the overall mean values were between 70 and 110 % for P. pinaster and 75 and 129 % for P. pinea. In the first species, the increase in sample mass lowered the recoveries slightly for most PAHs, whereas for the second, the recoveries were higher for the needles. Naturally contaminated samples from 4 sites were analysed, with higher levels for urban sites (1,320 and 942 ng g(-1) (dw) vs. 272 and 111 ng g(-1) (dw) for needles and 696 and 488 ng g(-1) (dw) vs. 270 and 103 ng g(-1) (dw) for bark) than for rural ones and also for P. pinaster samples over P. pinea. It is also shown that gas-phase PAHs are predominant in the needles (over 65 % of the total PAHs) and that the incidence for particulate material in bark, reaching 40 % as opposed to a maximum below 20 % for the needles. The method has proved to be fit and improved some of the existing approaches, on the assessment of particulate PAHs and bark levels.
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Affiliation(s)
- Nuno Ratola
- LEPAE, Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
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Skogerson K, Wohlgemuth G, Barupal DK, Fiehn O. The volatile compound BinBase mass spectral database. BMC Bioinformatics 2011; 12:321. [PMID: 21816034 PMCID: PMC3199763 DOI: 10.1186/1471-2105-12-321] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2011] [Accepted: 08/04/2011] [Indexed: 11/29/2022] Open
Abstract
Background Volatile compounds comprise diverse chemical groups with wide-ranging sources and functions. These compounds originate from major pathways of secondary metabolism in many organisms and play essential roles in chemical ecology in both plant and animal kingdoms. In past decades, sampling methods and instrumentation for the analysis of complex volatile mixtures have improved; however, design and implementation of database tools to process and store the complex datasets have lagged behind. Description The volatile compound BinBase (vocBinBase) is an automated peak annotation and database system developed for the analysis of GC-TOF-MS data derived from complex volatile mixtures. The vocBinBase DB is an extension of the previously reported metabolite BinBase software developed to track and identify derivatized metabolites. The BinBase algorithm uses deconvoluted spectra and peak metadata (retention index, unique ion, spectral similarity, peak signal-to-noise ratio, and peak purity) from the Leco ChromaTOF software, and annotates peaks using a multi-tiered filtering system with stringent thresholds. The vocBinBase algorithm assigns the identity of compounds existing in the database. Volatile compound assignments are supported by the Adams mass spectral-retention index library, which contains over 2,000 plant-derived volatile compounds. Novel molecules that are not found within vocBinBase are automatically added using strict mass spectral and experimental criteria. Users obtain fully annotated data sheets with quantitative information for all volatile compounds for studies that may consist of thousands of chromatograms. The vocBinBase database may also be queried across different studies, comprising currently 1,537 unique mass spectra generated from 1.7 million deconvoluted mass spectra of 3,435 samples (18 species). Mass spectra with retention indices and volatile profiles are available as free download under the CC-BY agreement (http://vocbinbase.fiehnlab.ucdavis.edu). Conclusions The BinBase database algorithms have been successfully modified to allow for tracking and identification of volatile compounds in complex mixtures. The database is capable of annotating large datasets (hundreds to thousands of samples) and is well-suited for between-study comparisons such as chemotaxonomy investigations. This novel volatile compound database tool is applicable to research fields spanning chemical ecology to human health. The BinBase source code is freely available at http://binbase.sourceforge.net/ under the LGPL 2.0 license agreement.
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Szmigielski R, Cieslak M, Rudziński KJ, Maciejewska B. Identification of volatiles from Pinus silvestris attractive for Monochamus galloprovincialis using a SPME-GC/MS platform. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2011; 19:2860-2869. [PMID: 22322293 PMCID: PMC3404288 DOI: 10.1007/s11356-012-0792-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Accepted: 01/25/2012] [Indexed: 05/31/2023]
Abstract
INTRODUCTION A myriad of volatile organic compounds (VOCs) released by terrestrial vegetation plays an important role in environmental sciences. A thorough chemical identification of these species at the molecular level is essential in various fields, ranging from atmospheric chemistry to ecology of forest ecosystems. In particular, the recognition of VOCs profiles in a context of plant-insect communication is a key issue for the development of forest protection tools. PURPOSE This work was aimed at the development of a simple, robust and reliable method for the identification of volatiles emitted from plant materials, which can attract or deter pest insects. Specifically, volatiles emitted from the bark of Pinus sylvestris were studied, which might attract the black pine sawyer beetle Monochamus galloprovincialis-a serious pest of the tree and a vector of a parasitic nematode Bursaphelenchus xylophius. METHOD The volatiles from bark samples were collected using a solid-phase micro-extraction technique, and subsequently analysed by gas-chromatography/mass-spectrometry (GC/MS). The characterisation of the volatile fraction was based on the comparison with data in mass spectral libraries, and in most cases, with the available authentic standards. The identified compounds were screened against the available entomological data to select insect attractors. RESULTS The identified components included terpenes (α-pinene, ∆-3-carene, and para-cymenene), oxygenated terpenes (α-terpineol and verbenone), sesquiterpenes (α-longipinene, longifolene, E-β-farnesene, γ-cadinene and pentadecane), and diterpenes (manoyl oxide and (+)-pimaral). Of these, longifolene and (+)-pimaral are of particular interest as plausible attractors for the M. galloprovincialis beetle that might find application in the construction of insect bait traps.
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Affiliation(s)
- Rafal Szmigielski
- Laboratory of Environmental Chemistry, Institute of Physical Chemistry, Polish Academy of Sciences, 44/52 Kasprzaka St, 01-224, Warszawa, Poland.
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Affiliation(s)
- Frank L. Dorman
- Department of Biochemistry and Molecular Biology, Penn State University, University Park, Pennsylvania 16802
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