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Gas chromatography mass spectrometry in drug analysis
Gas chromatography research paper
Gas chromatography research paper
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GC analysis
The Gas Chromatography GC was used a Agilent Technologies (7890A) interfaced with a mass-selective detector (MSD, Agilent 7000 Triple Quad) equipped with a polar Agilent HP-5ms (5%-phenyl methyl poly siloxane) (J&W Scientific, Folsom, CA, USA) equipped with a capillary column (30 m × 0.25 mm i. d. and 0.25 μm film thickness) and FID detector. Medium (Country) used for fractionations the date fruits, Echinacea extracts and camel according to methods performed by Dionex 22.
GC-MS analysis
Ethanol extracts of Echinacea arial part or date pulp fruits were performed separately using a Perkin-Elmer GC Clarus 500 system comprising an AOC-20i auto-sampler and a Gas Chromatograph interfaced to a Mass Spectrometer (GC-MS) equipped with a Elite-5MS (5% diphenyl/95% dimethyl poly siloxane) fused a capillary column (30 × 0.25 μm ID × 0.25 μm df). For GC-MS detection, an electron ionization system was operated in electron impact mode with ionization energy of 70 eV. Helium gas (99.999%) was used as a carrier gas at a constant flow rate of 1 ml/min, and samples were injected with a split ratio of 50:1; helium was used as carrier gas at 1.0 mL/ min. The column temperature was maintained at 100°C for 1 min after injection then increased at 10°C /min to 275°C which was sustained for 20 min. The time required for chromatography of one sample was 40 min.
TIC method for Identifications of the constituents
Identification and quantification of constituents: The relative percentage amount of each component was calculated by comparing its average peak area to the total areas (TIC) by apparatus software. The mass-detector used in this analysis was Turbo-Mass Gold-Perkin-Elmer, and the software adopted to handle mass spectra and chromatograms...
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...don Scientific, and Cheshire, UK), sectioned (4μm) and stained with hematoxylin and eosin (H&E) stain. The slides were mounted with neutral balsam.
Sensory evaluation
The Sensory evaluation of camel's milk, date pulp and Echinacea mixtures were assessed by regular taste panel (appearance,5-body& texture,5-and flavor ,10) by the staff-members at Food Sci. Dept., Fac. of Agric., Ain Shams University according to Clark et al., 26.
Works Cited
46. Al-Farsi M., Alasalvar C., Al-Abid M, et al.: Composition and functional chracteristics of dates, syrups and their by products. Food Chem 2007; 104:943-947
47. Chaplin D.D.: Overview of the immune response, J Allergy Clin Immunol 2010;125(2), S3-23.
48. Iemoli E, Piconi S, Fusi A, et al.: Immunological Effects of Omalizumab in Chronic Urticaria. A Case Report. J. Investig Allergol Clin Immunol 2010; 20(3): 252-254.
The primary goal of this laboratory project was to identify an unknown compound and determine its chemical and physical properties. First the appearance, odor, solubility, and conductivity of the compound were observed and measured so that they could be compared to those of known compounds. Then the cation present in the compound was identified using the flame test. The identity of the anion present in the compound was deduced through a series of chemical tests (Cooper, 2009).
Furthermore, equations obtained for carcass parameters were CY = 74.914 + 2.592 * (1-e – (8.218 * DL-Met + 3.976 * MHA-Ca)), AF = 2.246 + 0.573 * (1-e – (8.063 * DL-Met + 7.813* MHA-Ca)) and BY = 23.508 + 5.460 * (1-e – (5.546 * DL-Met + 3.131 * MHA-Ca)). Where CY is carcass yield, AF is abdominal fat and BY is breast yield. Thus, bioavailability of HMA-Ca relative to DL-Met were 52.43% for BWG and 57.48% for FC. Biological efficacies for CY, AF and BY were 42.57%, 87.02% and 49.69%, respectively. These results show that bioavailability of HMA-Ca relative to DL-Met are 54.955% for performance and 59.76% for carcass parameters on a product
Separations are important techniques in chemistry that are used to separate various components of a mixture. They are carried out by mixing two immiscible liquids containing certain solutes together in a separatory funnel, allowing them to separate, then extracting the distinct layers that form. The ratio of the concentration of solute present in the upper layer to the concentration in the lower layer is called the partition coefficient. The efficiency of a separation is described by this partition coefficient. If the coefficients for the two layers are largely different, then the separation can be carried out in a single step. If they aren’t, a more complex process is necessary.1,2 Countercurrent chromatography is a technique used carry out separations in these kinds of cases. It uses a continuous liquid-liquid partitioning process to streamline the usual extraction procedure.
Experiment #3: The purpose of this experiment to test the chromatography of plant pigments the alcohol test strip test will be used.
The pigment line of the sample leaf was extracted by repeatedly rolling a coin along a ruler edge that held the leaf 1.5-2cm from the bottom of Whatman #1 chromatography paper. Subsequently, a saturated environment was created to ensure that the solvent was separated by placing the beaker containing the rolled Whatman paper with the sample line on the outside into a mason jar containing the separation solvent, and sealing both compartments.
Anthocyanins, flavanols, flavanones,secoiridoids, phenolic acids, stilbenes, coumarins, and isoflavones form a large class of polyphenols, which are phenolic compounds. This study, however, focuses on one category of these phenolic compounds: phenolic acids. These particular compounds have been classified into two groups, namely hydroxycinnamic acids and hydroxybenzoic acids. The most common hydroxybenzoic acids are protocatechuic acid and gallic acid, while hydroxycinnamic acids include ferulic acid, coumaric acid, caffeic acid, chlorogenic acid, and sinapic acid, (Nigdikar, Williams, Griffin, & Howard). Unlike hydroxycinnamic acids, hydroxybenzoic acids usually occur at very low levels in some black radish, red fruits, and onions, accounting for about 10 ppm on a fresh weight basis. Protocatechuic ac...
The actual amount of crude product was determined to be 3.11 grams. The percent yield of the crude product was determined to be 67.75 %. The actual amount of pure product formed was found to be 4.38 grams. The percent yield of the pure product was determined to be 95.42%. Regarding the thin layer chromatography, the line from the solvent front is 8 centimeters.
Aspartame has been known as one of the most famous sweeteners and additives to food. Since its discovery in 1965-1969, it has now been developed into a commercial product in which several products use it to enhance its sweetness and taste. Because of this, it has also been a very prosperous commercial product where its company developers get much profit on. Nonetheless, it has been the subject of issue and controversy. Several reports and studies rebuke the suitability of it being a food product stating that it is more known as a poison. Therefore, in this essay, the advantages and limitations of Aspartame as a chemical food additive will be analyzed and evaluated with regards to Economic and environmental factors. Also, the physiological effect of this chemical additive will be looked upon and discussed.
In conclusion Gas Chromatography has many uses to separate and analyse compounds and to be able find separate components in a mixture to identify any unknown components. Because of it's simplicity and effectiveness it is one of the most important tools to chemistry. Like most analytical techniques it has its advantages such as not being harmful to the sample be used and disadvantages such as not being particularly use with liquids that change temperate easily.
Starting this experiment, we knew that the extraction was going to form varies layers due to the density differences. When placing three different substances, we saw that two layers formed because the Clove Oil is soluble in MTBE, but not in water. In order, to get the organic layer we used separatory funnel to take out the excess substances and leave the oil layer. Then we transferred to a beaker and dried with Magnesium Sulfate. Lastly, we filtered the liquid using funnel; we placed the liquid to boil, let it cool to room temperature. The purpose of drying and evaporation is to help us with the Gas Chromatography analysis of the product.
Pauly, S. (2011, February). News from ABC: changes and challenges. Analytical & Bioanalytical Chemistry. pp. 1003-1004. doi:10.1007/s00216-010-4459-0.
Chromatography is an extensive range of laboratory technique which aims to separate complex mixtures into their components which are distributed between a stationary phase bed and a mobile phase. There are various methods of chromatography. One method of mixture separation by chromatography is the column chromatography. Column chromatography gives a clear visual separation of components throughout the column. It is a cheap, simple method however it is time consuming. Another method of chromatography is thin layer chromatography which can be used to determine the number of components present within a mixture and to monitor column chromatography (Mohrig, et al., 2006). Thin Layer Chromatography is commonly used because it is a sensitive, speedy, easy and a rather inexpensive analytical technique of mixture separation. Examples of mixture that can be separated into their distinct components are chlorophylls from leaves of plants. Several different pigments are available from the leaves of the plant. Chlorophylls available in higher plants are chlorophylls a and chlorophylls b. Higher plant leaves also contain other pigments such as xanthophylls, carotenoids and phaeophytin. In some leaves, other pigments such as anthocyanins and antoxanthins may be found (Datta, 1994). All these pigments absorb light at certain wavelengths and appear as the color of reflected light. The aim of this practical is to understand the technique and principles of thin layer chromatography and column chromatography and identify the different pigments present within the leaves.
of sucrose, 88.5 lb. of allyl chloride, 46.2 lb. of sodium hydroxide and 23.1 lb. of water by Griffin, Willard, Sinnamon, Edwards and Redfield, Ind. Eng. Chem., 43, 2629 (1951) [5].
Materials and Methods: An ion exchange chromatography column was obtained and set up for purification with the addition of 0.5 ml ion exchange matrix. 1 ml
In this experiment, lipids from ground nutmeg are extracted using a combination of solvents and identify the lipids through chromatography. The purpose of using solvent combinations is to elute the lipids based on their polarity to binding of the silica gel. The chromatography is performed on a silica gel plate and the use of iodine to visualize the lipids. By calculating the Rf values for each compound and comparing them to the known lipids, we are able to distinguish the lipids within the grounded nutmeg.