Analytical chemistry Essays

  • Organic Chemistry Experiment 3: Chromic Acid Oxidation Reaction

    702 Words  | 3 Pages

    Organic chemistry II Experiment 3: chromic acid oxidation reaction Introduction: Camphor is very compact and its molecular structure is symmetrical which gives it the property to change directly from a solid to vapour when heated. Therefore, camphor can easily be purified by sublimation technique. Sublimation is a phase change in which a solid phase passes directly into the vapour without going through an intermediate liquid phase. Solids which have vapour pressure below melting points can be purified

  • Thin Layer Chromatography Lab Report

    929 Words  | 4 Pages

    Thin Layer Chromatography (TLC) Abstract This experiment uses the TLC chromatography technique to identify the presence of acetylsalicylic and Acetaminophen in analgesic drugs (Tylenol and Anacin). It was found that the Anacin and acetylsalicylic had very closer Rf values (0.8 and 0.79). The Tylenol and acetaminophen had closer Rf values (0.54 and 0.58). Hence, Acetylsalicylic acid and acetaminophen were present in Anacin and Tylenol tablets respectively. Introduction Chromatography is the technique

  • Gas Chromatography Essay

    1867 Words  | 8 Pages

    or solid that stays where it is that is known as stationary phase. As the mobile phase moves, it separates out into its components on the stationary phase and identify one by one afterwards. (1) The development of Gas Chromatography (GC) to be an analytical technique to separate the components of a mixture

  • Should Drugs Be Allowed In Sports Essay

    2415 Words  | 10 Pages

    Should the use of performance enhancing drugs be allowed in sports? In this essay I will be writing about the usage of performance enhancing drugs and whether they should or should not be allowed to take in sports. I will be mentioning my views on this question, the local and global perspective, as well as the impact that performance enhancing drugs will have on the world of sport and the world in general. Sports is a massive and worldwide industry. From the very start doping/taking drugs in professional

  • Lab Report Gas Chromatography

    1389 Words  | 6 Pages

    causing them to be separated. In fact, the separation is based on differential partitioning between the mobile and stationary phases [1]. Chromatography may be preparative or analytical. The purpose of preparative chromatography is to separate the components of a mixture for later use, and it is a form of purification. For analytical chromatography, it is normally done with smaller amounts of material with the purpose of establishing the

  • Gas Chromatography Lab Report

    1545 Words  | 7 Pages

    separation and analysis of gaseous samples, liquid solutions, and volatile solids. If the sample to be analyzed is non-volatile, the techniques of derivatization or pyrolysis GC can be utilized. Gas chromatography (GC) has been an indispensable analytical technique in the application of fatty acid determinations in oilseed plant breeding, biosynthesis, and human metabolism. As well as the characterization of complex mixtures of geometric isomers when combined with other chromatographic separations

  • Paper Chromatography Essay

    841 Words  | 4 Pages

    Complex mixtures can be separated and analyze using physical methods. One of it is chromatography. Two components in a mixture are separated by using the different distribution between two non- miscible phases which is stationary phase and mobile phase. The stationary phase exists as liquid or solid and it is fixed in a system. The mobile phase is a fluid which streams through the chromatographic system. In general, the process of chromatography is about a mixture of various components enter the

  • Chromatography Lab Report Discussion

    1458 Words  | 6 Pages

    Introduction The term chromatography actually means colour writing, and signifies a technique by which the substance to be examined is placed in a vertical glass tube containing an adsorbent, the different segments of the substance traveling through the adsorbent at distinctive rates of velocity, according to their degree of attraction to it, and producing bands of colour at different levels of the adsorption column. The substances least absorbed emerge earliest; those more strongly absorbed emerge

  • Ketoconazole Loaded Proliposomes Lab Report

    1072 Words  | 5 Pages

    Preparation of ketoconazole loaded Proliposomes Ketoconazole (KTZ) loaded proliposomal gel formulations were formulated by method reported by Perret et al. 1991 with slight modification. Constant amount of drug was added to varying ratios of phophatidylcholine and cholesterol which constitute lipid component of 1mmol quantity. This lipid mixture was prepared in clean and dry, wide mouthed glass vials to which 400µL of absolute alcohol was added and after confirming the formation of homogenous dispersion

  • Photosynthetic Pigments Research Paper

    826 Words  | 4 Pages

    In thin layer chromatography, the example is separated in the flexible stage dissolvable. The ensuing course of action is then spotted near the base of the rectangular sheet of glass or plastic secured with silica. The sheet is then submerged in a chamber containing a little measure of dissolvable, keeping the spots over the surface of the dissolvable. Once the sheet is set in the chamber, the dissolvable begins to increase on the sheet through thin movement. The covering on the sheet is the staionary

  • Essay On Thin Layer Chromatography

    1608 Words  | 7 Pages

    Chromatographic analysis: Thin Layer Chromatography175 Procedure Thin layer chromatography is used for the separation, identification and quality control of drug. It also determines small amount of impurities or adulterants if present. Apparatus Glass plates of uniform thickness, 15-20 cm long and wide, spreader, chromatographic chamber of glass with a tightly fitting lid having suitable size to accommodate the glass plates and capillary, ultraviolet light source emitting short 254 nm and long

  • Experiment Stock Benzoic Acid

    717 Words  | 3 Pages

    Procedure First, five standard solutions were made using 10-, 20-, 30-, 40-, and 50-mg/L of caffeine. The 10-mL solution was created by mixing 10-mL caffeine standard and 10.0-mL 0.10M HCl and diluting to 100.0-mL. This same procedure was used to make the rest of the solutions. Then 6.0-mL of soda, with the carbon dioxide removed, was placed in a 100-mL volumetric flask along with 10.0-mL 0.10m HCl and diluted. Then, the UV absorbance of the five standards was taken. Water was used in the reference

  • Gas Chromatography Abstract

    3251 Words  | 14 Pages

    Abstract Gas chromatography (GC) and high performance liquid chromatography (HPLC) is an important technique which is used for the analysis of mixtures. In these instruments the mixture allows mixtures the instrument allows mixtures to separate in each components and determine the amounts of components present in sample. By using GC and HPLC we can analyzed a very small (microliters) sample. The sample which we want to analyze by GC must be volatile. The vaporized sample is allowed to flow in along

  • Column Chromatography Essay

    1137 Words  | 5 Pages

    Detection and Purification A Monascus pigments is a complex of azaphilone compounds, which can be separated by using various analytical techniques. UV- Visible spectrophotometric methods The UV-Visible spectrophotometric method is usually used for the confirmation of pigments produced by Monascus with taking absorbance at a respective wavelength. i.e. Yellow pigment at 400, Orange 470, and Red at 500 nm. The pure solvent or extract of unfermented substrate was always used as the blank (Carels and

  • Essay On Column Chromatography

    991 Words  | 4 Pages

    known as cation-exchange or anion-exchange chromatography, depending on whether the solutes to be exchanged are positively or negatively charged. Size Exclusion Chromatography: Here the molecules are separated according to their molecular weight and it is suitable for molecules having molecular weight of 2000 Daltons or more. Largest molecules are eluted first and the smallest molecules last. Affinity Chromatography: Here the stationary phase contains specific groups of molecules which can absorb

  • Essay On Ion Exchange Chromatography

    966 Words  | 4 Pages

    Ion Exchange Chromatography is a technique for ionic separation based on exchange with resins in stationary phase and the eluents in mobile phase. These stages are based on the exchanges in an anion column to attract anions or in a cation column to attract cations. cations. A column measures the conductivity of a particular ion based on its affinity/attraction to it. The speed of movement of ions through the ion chromatograph columns depends not only on the diameter of the column but basically on

  • Organic Modifier Case Study

    1433 Words  | 6 Pages

    3. Results and discussion 3.1. Optimization of chromatographic conditions A rapid, simple, reproducible and accurate RP-HPLC method was developed for simultaneous determination of pregabalin and atenolol in dosage forms, spiked and volunteer human urine. To optimize the proposed HPLC method; several parameters such as effect of organic modifier, pH of buffer and flow rate were studied. The effect of organic modifier: The percentage of organic modifier (methanol) has a critical effect on separation

  • Literature Review On Reading Comprehension

    1282 Words  | 6 Pages

    Reading comprehension skill among children in Malaysia is extremely going down from day to day. As stated in the Malay Mail Online (2015), ‘In the 2012 edition of the PISA, Malaysia ranked 52nd overall out of 65 countries due to a dip in reading ability and science’. Therefore, some solutions need to be taken to overcome the problem. This chapter reviews literature relevant to the proposed study. It will be recalled that this study aims to identify the effectiveness of 5 Finger Retelling Strategy

  • Character And Setting In Romeo And Juliet

    718 Words  | 3 Pages

    Character and Setting Making a decision among the young is very critical and hazardous task. It is during youth that most actions are done hastily and aggressively especially those who are not exposed to various experiences. This lesson will show you how a young man who grows in the rural area who has not seen the hardship of life makes a hasty decision that gives him a great lesson in life. You will also find out how it feels to stay in the barrio with less exposure to the adversities of

  • Mary And Max Movie Analysis

    1601 Words  | 7 Pages

    Mary and Max The first time I saw Mary and Max, I didn’t like it as it made me very sad. Mary and Max is a very deep bittersweet film about the friendship of two very incomplete souls. The second and subsequent times I watch it, I begin to understand the film a little better and are made more aware of people with mental illness and their world. This world is a rather cruel place. When people do not fully understand something, they prefer to take the cognitive shortcut and just brush off the complicated