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对印度楝树油中高级脂肪酸成分进行分析,经甲酯化后用气相色谱-质谱联用仪鉴定了 其中所含高级脂肪酸的成分,用气相色谱法-火焰离子化检测器对其成分进行定量分析.溶剂浸泡萃取和二氧化碳超临界萃取两种不同方法得到的脂肪酸成分基本相同,其中油酸相对含量为51.15%,硬脂酸相对含量为19.13%,棕榈酸相对含量为16.78%,亚油酸相对含量为9.86%,花生酸相对含量为1.24%,其他含量低于1%的高级脂肪酸还有顺-3-辛基-环氧乙烷-辛酸,山萮酸,9-十八(碳)烯酸,11-二十碳二烯酸,9-十六碳烯酸,十七(烷)酸等. 相似文献
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甲鱼油脂肪酸组成的研究 总被引:12,自引:2,他引:12
用热提取方法抽取出甲鱼油,用KOH-CH3OH酯交换法甲酯化处理,以色谱/质谱方法测定脂肪酸的组成。共鉴定出21种脂肪酸,其中以棕榈酸、棕榈油酸、硬脂酸、油酸、亚油酸、二十碳五烯酸(EPA)、二十二碳五烯酸(DHA)为主 相似文献
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气相色谱-质谱测定红树植物桐花树叶中的挥发油和脂肪酸的组成 总被引:2,自引:0,他引:2
采用气相色谱-质谱联用分析法,分析测定了红树植物桐花树AegicerasCorniculatum叶子中挥发油和脂肪酸的成分.结果表明:挥发油中分离出24个峰,鉴定出8种化合物,2,6-二叔丁基-4-甲基苯酚含量丰富,占挥发油总量的20.60%;脂肪酸中分离出16个峰,鉴定出10种脂肪酸,其中主要成分有十六酸(棕榈酸,16.17%)、9,12-十八碳二烯酸(亚油酸,25.73%)、9-十八碳烯酸(油酸,41.52%)等. 相似文献
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GC/MS法分析奶油中的脂肪酸 总被引:1,自引:0,他引:1
利用气相色谱/质谱/计算机联用技术分析人造奶油、天然奶油和新西兰奶油中的脂肪酸,从中鉴定出7种酸:棕榈酸、棕榈油酸、硬脂酸、油酸、亚油酸、亚麻油酸及花生酸。人造奶油含亚油酸比天然奶油含的高。 相似文献
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《分析试验室》2016,(12)
采用气相色谱-质谱联用(GC-MS)方法测定了8种云南植物油脂肪酸含量并对其差异性进行了分析。植物油经甲酯化处理后,用GC-MS方法测定其脂肪酸含量。通过与标准样品保留时间比较和检索NIST标准谱库定性,峰面积归一化法定量。山茶油和辣木籽油含油酸(C18:1)较高,油酸含量分别为80.47%和71.90%;核桃油和假酸浆籽油含亚油酸(C_(18:2))较高,含量分别为60.75%和70.78%;香薷油和藿香籽油含α-亚麻酸(C_(18:3))较高,含量分别为47.13%和55.08%。橡胶树籽油中硬脂酸(C_(18:0))含量9.22%,油酸(C_(18:1))24.07%,亚油酸(C_(18:2))37.17%,α-亚麻酸(C18:3)19.72%,几种脂肪酸分布较为均匀。藿香籽油中不饱和脂肪酸(UFA)含量最高为93.75%。辣木籽油饱和脂肪酸(SFA)含量最高为23.29%;辣木籽油中花生酸(C_(20:0))、二十碳烯酸(C_(20:1))、榆树酸(C_(22:0))和木蜡酸(C_(24:0))含量分别为3.94%、2.73%、6.41%和1.10%,均远远高于其他7种植物油相对应的脂肪酸含量,可作为鉴定辣木籽油的重要依据。 相似文献
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A sensitive and robust on-line LC/MS method was developed for quantitative determination of linoleic acid,docosahexaenoic acid and docosanoic acid from edible oil samples.The oil samples were dissolved in chloroform-isopropyl alcohol(20:80,v:v)solution and the three fatty acids were separated by HPLC with a C4 column using 10 mmol/L ammonium acetate-isopropyl alcohol-acetonitrile(20:40:40,v:v:v)mobile phase in isocratic elution.Electrospray ionization mass spectrometry with the selected ion recording monitoring was used to detect and quantify the fatty acid.The calibration curves were linear in the range of 10.00–5000 pg/mL for linoleic acid and docosanoic acid,and 1.000–500.0 pg/mL for docosahexaenoic acid.The limit of detection was 2.0 pg/mL for linoleic acid,3.0 pg/mL for docosanoic acid,and 0.20 pg/mL for docosahexaenoic acid.The results showed that the method described in this paper could be utilized for rapid determination of three fatty acids at picogram levels in edible oils. 相似文献
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建立了分析棉籽仁中脂肪酸组成的在线热辅助甲基化-气相色谱法。将0.3 mg棉籽仁样品与2 μ L三甲基氢氧化硫(0.2 mol/L)加入裂解器,在350℃下进行甲基化反应,通过气相色谱仪进行分离分析,共检测到8种脂肪酸甲酯成分,分别为亚油酸(C18:2)、油酸(C18:1)、棕榈酸(C16:0)、硬脂酸(C18:0)、肉豆蔻酸(C14:0)、棕榈油酸(C16:1)、花生酸(C20:0)和二十二酸(C22:0),不饱和脂肪酸的相对含量为66.30%~72.54%,其中亚油酸的相对含量为43.20%~53.61%,相对峰面积的相对标准偏差(RSD)小于10%(n=5)。通过分析5组棉籽仁样品与3种食用油中的脂肪酸组成,结果表明不同产地的棉籽仁中的脂肪酸组成差异不明显,且棉籽仁中的脂肪酸组成与玉米油最为接近,相似度为0.960~0.992。该方法简单、快速、准确,适合分析棉籽仁中的脂肪酸组成。 相似文献
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Mateo-Castro R Gimeno-Adelantado JV Bosch-Reig F Doménech-Carbó A Casas-Catalán MJ Osete-Cortina L De la Cruz-Cañizares J Doménech-Carbó MT 《Fresenius' Journal of Analytical Chemistry》2001,369(7-8):642-646
GC-FID was used as single methodology for the identification and differentiation of proteins, lipids and ox bile from binders used in artistic paintings. The samples were hydrolyzed by HCl. Subsequently, the simultaneous formation of volatile derivatives of the amino, fatty and bile acids with ethyl chloroformate was performed quickly and safely in an aqueous medium. The derivatives were separated by capillary GC and characterized by GC-MS. The ageing of drying oils was studied, identifying pelargonic acid among other degradation products. Proteinaceous and lipoid binding media were characterized by means of the quotients between the areas of the peaks for each amino or fatty acid with respect to the area of the peak for alanine or palmitic acid. Fatty acids from ox bile were easily identified by their retention times characteristic for eicosanoic, docosanoic and pentadecanoic acids. The suggested method was applied to the analysis of binders in baroque paintings by Palomino in Valencia (Spain). Animal gelatine and linseed oil were found. 相似文献
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A fluorimetric liquid chromatography for highly sensitive analysis of very long chain fatty acids as naphthoxyethyl derivatives 总被引:3,自引:0,他引:3
Summary A simple and sensitive liquid chromatographic method is described for the simultaneous determination of biologically important
very long chain fatty acids (docosanoic, tetracosanoic and hexacosanoic acids) as fluorogenic derivatives. The method is based
on the derivatization of the fatty acids with 2-(2-naphtoxy)ethyl 2-(piperidino)ethanesulfonate (NOEPES) in toluene in the
presence of potassium carbonate and 18-crown-6. Several parameters affecting the derivatization were studied, including reaction
temperature, reaction time, reaction solvent, base catalyst and the amount of the reagent. The resulting derivatives were
analyzed by HPLC with fluorimetric detection (λex=235 nm; λem=366 nm). The linear range for the determination of docosanoic,
tetracosanoic and hexacosanoic acids was 0.028–1.4 μM with a detection limit of about 5.6 nM (S/N=3) (56 fmol per 10 μL injection).
Application of the method to the analysis the non-esterified (free) very long chain fatty acids spiked in plasma proved feasible. 相似文献
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R. Mateo-Castro J. V. Gimeno-Adelantado F. Bosch-Reig A. Doménech-Carbó M. J. Casas-Catalán L. Osete-Cortina J. De la Cruz-Cañizares M. T. Doménech-Carbó 《Analytical and bioanalytical chemistry》2001,369(7-8):642-646
GC-FID was used as single methodology for the identification and differentiation of proteins, lipids and ox bile from binders
used in artistic paintings. The samples were hydrolyzed by HCl. Subsequently, the simultaneous formation of volatile derivatives
of the amino, fatty and bile acids with ethyl chloroformate was performed quickly and safely in an aqueous medium. The derivatives
were separated by capillary GC and characterized by GC-MS. The ageing of drying oils was studied, identifying pelargonic acid
among other degradation products. Proteinaceous and lipoid binding media were characterized by means of the quotients between
the areas of the peaks for each amino or fatty acid with respect to the area of the peak for alanine or palmitic acid. Fatty
acids from ox bile were easily identified by their retention times characteristic for eicosanoic, docosanoic and pentadecanoic
acids. The suggested method was applied to the analysis of binders in baroque paintings by Palomino in Valencia (Spain). Animal
gelatine and linseed oil were found.
Received: 27 September 2000 / Revised: 16 January 2001 / Accepted: 17 January 2001 相似文献
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The fatty acid profile and beta-carotene content of a number of Australian varieties of purslane (Portulaca oleracea) were determined by GC and HPLC. The total fatty acid content ranged from 1.5 to 2.5 mg/g of fresh mass in leaves, 0.6 to 0.9 mg/g in stems and 80 to 170 mg/g in seeds. alpha-Linolenic acid (C18:3omega3) accounted for around 60% and 40% of the total fatty acid content in leaves and seeds, respectively. Longer-chain omega-3 fatty acids were not detected. The beta-carotene content ranged from 22 to 30 mg/g fresh mass in leaves. These results indicate that Australian purslane varieties are a rich source of alpha-linolenic acid and beta-carotene. 相似文献
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The Ammi majus seeds oil constituents of methyl ester derivatives of fatty acids were analyzed using Gas Chromatography coupled to mass spectrometer. The results obtained containing the saturated as well as unsaturated fatty acids of majus seeds oils. A total of 18 different components were identified and quantified. Methyl ester of linoleic acid was found in high concentration 9.00%, among the identified analytes of interest. In addition methyl ester of Oleic acid 5.60%, Palmitic acid 3.98% Linolenic acids 1.42% were found. Concentration of the rest of identified fatty acids analytes were less than 1%. Thus from the results it is apparent that due to the presence of high percentage of valuable analytes concentrations detected in the fatty acid of A. majus, has increased its importance for the consumption in the pharmaceuticals as well as its applications in the new formulations for various skin diseases to prevent and cure from different infections. 相似文献
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Tafadzwa Kaseke Umezuruike Linus Opara Olaniyi Amos Fawole 《Molecules (Basel, Switzerland)》2021,26(15)
Enzymatic pretreatment of seeds is a novel approach that enhances the health benefits of the extracted oil. The study investigated the influence of the enzymatic pretreatment of seeds on the quality of oil from different pomegranate cultivars. The quality of the ultrasound-assisted (and ethanol-extracted) oil was studied, with respect to the refractive index (RI), yellowness index (YI), conjugated dienes (K232), peroxide value (PV) ρ-anisidine value (AV), total oxidation value (TOTOX), total carotenoid content (TCC), total phenolic compounds (TPC), fatty acid composition, phytosterol composition, ferric reducing antioxidant power (FRAP), and 2.2-diphenyl-1-picryl hydrazyl (DPPH) radical scavenging capacity. The seeds of three different pomegranate cultivars (‘Wonderful’, ‘Herskawitz’, and ‘Acco’) were digested with an equal mixture of Pectinex Ultra SPL, Flavourzyme 100 L, and cellulase crude enzymes, at a concentration, pH, temperature, and time of 1.7%, 4.5, 40 °C, and 5 h, respectively. Enzymatic pretreatment of PS increased oil yield, PV, TPC, TCC, and DPPH radical scavenging capacity, but decreased the YI. The levels of K232, AV and TOTOX, fatty acids, phytosterols, RI, and FRAP, were not significantly affected by enzymatic pretreatment of PS. Principal component analysis (PCA) established that oil extracted from the ‘Acco’ seed after enzymatic pretreatment had higher yield, TPC, TCC, and DPPH radical scavenging capacity. Therefore, enzyme-pretreated ‘Acco’ pomegranate fruit seed is a source of quality seed oil with excellent antioxidant properties. 相似文献
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比较峰面积归一化法与标准曲线法两种方法分析植物油中脂肪酸百分比含量的差异。利用气相色谱-质谱联用仪(GC-MS)检测10种市售食用植物油中的8种主要脂肪酸,峰面积归一化法和标准曲线法计算脂肪酸的百分比含量。结果表明,标准曲线法与峰面积归一化法相比,肉豆蔻酸、棕榈酸、十七烷酸、硬脂酸和棕榈油酸所占的百分比升高,而油酸、亚油酸和亚麻酸比例降低;饱和脂肪酸比例升高,不饱和脂肪酸百分比降低。利用峰面积归一化法计算植物油中脂肪酸百分比时,降低了饱和脂肪酸比例,升高了不饱和脂肪酸比例,可能对健康有潜在的不利影响。建议使用标准曲线法计算不同植物油中脂肪酸的百分比。 相似文献