GC-FID
Detection and quantification of naringenin and kaempferol in melastoma decemfidum extracts by GC-FID and GC-MS
... Summary. Melastoma decemfidum is a plant species from the Melastomataceae family. The plant was reported to have bioactive flavonoids, which showed antioxidant and cyto- toxic activities. Extracts from the leaves of 26 ...
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Quality Evaluation of Policosanol Film Coated Tablets by Simultaneous Determination of Eight Ingredients Using GC FID and GC MS
... separation. GC-FID was used to quantitatively analyze the eight ingredients with 1-eicosanol as internal standard, three of which were identified using GC-MS due to the lack of ...
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A comparison of GC-FID and PTR-MS toluene measurements in ambient air under conditions of enhanced monoterpene loading
... the GC-FID measure- ments was slightly improved as compared with the uncor- rected PTR-MS measurements (Table 4); however, the cor- rections were entirely within the PTR-MS measurement pre- cision and ...
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Development of a Rapid Method for the Determination of Caffeine in Coffee Grains by GC-FID-A Fully Validated Approach
... A simple method for the determination of caffeine in coffee grains by GC-FID is presented in the current work. The method was fully validated according to ISO 17025 requirements and European Commission ...
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GC FID AND PHYSICOCHEMICAL STUDIES OF OIL FROM THE LEAVES OF FICUS ELASTICA LINN
... Fatty acid profile was determined by gas chromatograph coupled with flam ionization detector (GC-FID) after esterification of the oil with methanol in the presence of boron trifluoruide. It contains lauric ...
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A comparison of GC-FID and PTR-MS toluene measurements in ambient air under conditions of enhanced monoterpene loading
... by GC-FID demonstrated large enhance- ments in monoterpene mixing ratios relative to toluene, with median and maximum enhancement ratios of ∼ 2 and ∼ 30, ...the GC-FID and PTR-MS toluene ...
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GC-FID analysis of fatty acids and biological activity of Zanthoxylum rhetsa seed oil
... The Fatty acid content and composition of fixed oil from Zanthoxylum rhetsa seeds was determined. The seeds were found to contain about ~19.5% of crude fixed oil on a dry weight basis. Fatty acids were converted into ...
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Optimized Method to Analyze Rose Plant Volatile Organic Compounds by HS SPME GC FID/MSD
... The HS-SPME technique also provides interesting results when gas chroma- tography (GC) is combined with Flame Ionization Detector (FID) and mass spectrometric detection (MS). The SPME technique gives ...
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Simultaneous measurement of formic acid, methanol and ethanol in vitreous and blood samples of postmortem by headspace GC-FID
... Methods: Following the modification of a previously developed gas chromatography method, vitreous and blood samples of 43 postmortem cases with a history of methanol intoxication were collected over a period of 2 years ...
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Solid-phase extraction derivative aromatic compounds in water samples and determination of using GC-FID
... A simple method to pre-concentrated derivative aromatic compounds on active carbon in column has been applied as stationary phase which is used to measure the concentration of derivative aromatic compounds in water ...
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Development and Validation of a GC-FID Method for Diagnosis of Methylmalonic Acidemia
... Background: Urinary organic acids are water-soluble intermediates and end products of the metabolism of amino acids, carbohydrates, lipids, and a number of other metabolic processes. In the hereditary diseases known as ...
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Ultra-Trace Determination of Methyl Carbamate and Ethyl Carbamate in Local Wines by GC-FID Following Pre concentration with C18-SPE
... of GC-FID were thus ready to run with reliable and accuracy output which consisted of the split ratio, 30:1; 1 µL injection volume; temperature programming from 50°C for 5 min; 8°C/min to 100°C for 1 min ...
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Determination of Vitamin E in Cereal Products and Biscuits by GC-FID
... In this article a rapid, precise and accurate method for the determination of Vitamin E in cereal products by GC-FID is presented. The method is based on the method presented by Pyka et al. (2001) for the ...
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Challenges associated with the sampling and analysis of organosulfur compounds in air using real-time PTR-ToF-MS and offline GC-FID
... and GC-FID, were applied to the investigation of organosul- fur emissions from bins in a suburban location where most of the waste is from ...by GC-FID ...
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Optimization and validation for determination of volatile organic compounds from mediterranean fruit fly (Medfly) ceratitis capitata (diptera: Tephritidae) by using HS-SPME-GC-FID/MS
... 18. Zhang, C., M. Qi, Q. Shao, S. Zhou and R. Fu, 2007. Analysis of the volatile compounds in Ligusticum chuanxiong Hort. using HS-SPME-GC-MS. J. Pharm. Biomed. Anal., 44: 464-470. 19. Niu, Y., G. Hardy, L. Hua, ...
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GC-FID determination of nucleobases guanine, adenine, cytosine, and thymine from DNA by precolumn derivatization with isobutyl chloroformate
... The nucleobases G, C, A, T, and U were eluted from the GC column HP-5 after derivatization with IBCF and were separated from the derivatizing reagent easily. Each of the compounds indicated a single peak. Attempt ...
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A New Sampler and Analysis Method for BTEX in Ambient Air
... Environmental concentrations of BTEX in the ambient air of major cities of the world have been studied using the EPA analytical method (13,14). A Japanese study group studied benzene concentration in the ambient air of ...
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Fatty Acids Analysis and Antioxidant Activity of Fixed Oil of Quercus Infectoria Grown in Jordan
... Quercus infectoria seeds were used in the present study, and fatty acid content in fixed oil was determined using GC-FID. The total amount of the oil present in the seed was 7.2%. The major fatty acid ...
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Quantitative and enantioselective analysis of monoterpenes from plant chambers and in ambient air using SPME
... Abstract. A headspace solid-phase microextraction (HS-SPME) and gas chromatography/mass spectrometry (GC/MS) system has been developed for quantifying enantiomeric and nonenantiomeric monoterpenes in plant chamber ...
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Enhancing oil production and harvest by combining the marine alga Nannochloropsis oceanica and the oleaginous fungus Mortierella elongata
... Mortierella fungi are known to produce high amounts of TAG and PUFAs including ARA [34, 35]. Indeed, numer- ous lipid droplets were observed in both Mortierella and Morchella fungi tested for algae flocculation (Fig. ...
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