Comparison of supercritical fluid extraction and Soxhlet extraction for the determination of aliphatic hydrocarbons in seaweed samples

Crespo, Marta Otero; Yusty, María Asunción Lage

doi:10.1016/j.ecoenv.2005.04.010

Cited by 31 publications

(7 citation statements)

References 18 publications

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“…These values were like the ones found in this study for the same seaweed (5.4 to 28 µg/g DW). C18 was found to be the most abundant [24]. This hydrocarbon is also the most common in the seaweeds reported in this study (not detected (n.d.) to 12 µg/g DW), followed by C19 (0.16 to 5.7 µg/g DW).…”

Section: Ahcs In Seaweedssupporting

confidence: 50%

“…Lipids were extracted by Soxhlet apparatus (Soxtest, Raypa, Barcelona Spain) according to Crespo et al [24]. The extract was evaporated, and the lipid content of the sample was calculated by the mass of the dry residue [1].…”

Section: Lipid Extraction and Determination Of Total Lipids In Seaweedmentioning

confidence: 99%

“…Eight AHCs (Octadecane (C18), Nonadecane (19), Eicosane (C20), Docosan (C22), Tetracosan (C24), Octacosan (C28), Dotriacontano (C32), and Hexatriacontano (C36)) were selected because they had already been described in the literature as present in seaweed in various parts of the world [8]. AHCs were isolated from the lipid extract by activated carbon, submitted to solid-phase extraction (SPE) clean-up [24], and analyzed by GC-FID, with the equipment and column described in Section 2.3. One µL was injected in split mode.…”

Section: Determination Of Ahcsmentioning

confidence: 99%

“…Comparing the results obtained with those in the literature for total AHCs, A. nodosum presents higher values (11-32 µg/g DW) than the values reported by Clark and Blumer [45], which was 6.96 µg/g DW. Crespo et al [24] analyzed U. pinnatifida samples collected at different dates and areas of the Galician coast. The n-alkanes C18, C20, C22, C24, and C28 were found in all samples, with values lower than 7.9 µg/g DW and the total hydrocarbon content was within the range of 13.6-21.7 µg/g DW.…”

Section: Ahcs In Seaweedsmentioning

confidence: 99%

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Bioactive Lipids of Seaweeds from the Portuguese North Coast: Health Benefits versus Potential Contamination

Soares

Sousa

Machado

et al. 2021

Foods

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The total lipid content and lipidic profile of seaweeds harvested in the North Coast and purchased in Portugal were determined in this paper. The amount of total lipids in the different species of seaweeds varied between 0.7 ± 0.1% (Chondrus crispus) and 3.8 ± 0.6% (Ulva spp.). Regarding the fatty acid content, polyunsaturated fatty acids (PUFA) ranged between 0–35%, with Ulva spp. presenting the highest amount; monounsaturated fatty acids (MUFA) varied between 19 and 67%; and saturated fatty acids (SFA) were predominant in C. crispus (45–78%) and Gracilaria spp. (36–79%). Concerning the nutritional indices, the atherogenicity index (AI) was between 0.4–3.2, the thrombogenicity index (TI) ranged from 0.04 to 1.95, except for Gracilaria spp., which had a TI of 7.6, and the hypocholesterolemic/hypercholesterolemic ratio (HH) values ranged between 0.88–4.21, except for Gracilaria spp., which exhibited values between 0.22–9.26. The n6/n3 ratio was below 1 for most of the species evaluated, except for Ascophyllum nodosum, which presented a higher value, although below 2. Considering the PUFA/SFA ratio, seaweeds presented values between 0.11–1.02. The polycyclic aromatic hydrocarbons (PAHs) and aliphatic hydrocarbons (AHCs) contamination of seaweeds under study was also quantified, the values found being much lower than the maximum levels recommended for foodstuff.

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Section: Ahcs In Seaweedssupporting

confidence: 50%

Section: Lipid Extraction and Determination Of Total Lipids In Seaweedmentioning

confidence: 99%

Section: Determination Of Ahcsmentioning

confidence: 99%

Section: Ahcs In Seaweedsmentioning

confidence: 99%

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Bioactive Lipids of Seaweeds from the Portuguese North Coast: Health Benefits versus Potential Contamination

Soares

Sousa

Machado

et al. 2021

Foods

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“…The samples were dissolved in more n-Hexane to 10 mL, stirred thoroughly and filtered through Whatman No 1 filter paper .The solvent was allowed to evaporate then one mL more n-Hexane was added and filtered again into GC-MS tube using 0.45 mm syringe filter for GC-MS analysis. Blank sample of crude oil was cleaned up using the same process [6].…”

Section: Fractionation Analysis Of Extracted Oilmentioning

confidence: 99%

Biodegradation of Crude Oil Contaminated Soil in Sudan Using Sudanese Plant Acacia seyal Del

Abdallah

Elhussein

Ibrahim

2023

IJPSS

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Phytoremediation is an environmental technology in which plants are used for decontamination of organic and inorganic pollutants from soils and water. Acacia seyal Delile was tested for it is ability to degrade crude oil contaminated soil in four concentrations 0.5, 1, 1.5 and 2% (w/w) of crude oil. Plant parameters, degradation percentage, retention time and bacterial count were calculated. Results showed that at the end of the growth period of A. seyal Del no such adverse effect was observed on the shoot length and it is better than that of the control at the 2% concentration by the end of the growth period. This result highlights the ability of A. seyal Del to grow under stress of oil contamination. A. seyal root length has substantially increased at two and four month’s interval and no significant difference was observed at these two intervals. A. seyal Del shoot biomass was significantly (p<0.05) negatively affected by crude oil at four month intervals, Root weight of A. seyal Del have decreased steadily. Degradation percentage was found to be in the range between 49-54%. Penadecane is the first compound appear in most cases and the retention time was between 13.7-32.9 min. Number of compounds detected in the rhizosphere those were 57, 70 and 167 compound after two, four and six month of growth respectively. Viable count of the dominant bacteria showed that there is no significant different between concentrations (P=0.699), also there is no significant difference between intervals (P=0.08) in bacterial number. This study reveals the visibility of using tropical plant Acacia seyal in crude oil degradation.

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Seaweed Antimicrobials: Isolation, Characterization, and Potential Use in Functional Foods

Tan

O’Sullivan

Prieto

et al. 2013

Bioactive Compounds From Marine Foods

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Comparison of supercritical fluid extraction and Soxhlet extraction for the determination of aliphatic hydrocarbons in seaweed samples

Cited by 31 publications

References 18 publications

Bioactive Lipids of Seaweeds from the Portuguese North Coast: Health Benefits versus Potential Contamination

Bioactive Lipids of Seaweeds from the Portuguese North Coast: Health Benefits versus Potential Contamination

Biodegradation of Crude Oil Contaminated Soil in Sudan Using Sudanese Plant Acacia seyal Del

Seaweed Antimicrobials: Isolation, Characterization, and Potential Use in Functional Foods

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