...CHEM 5 Quantitative Analysis Laboratory Outline. 55labout.doc 02/06/05 Objectives: • development of quantitative laboratory skills • introduction to modern analytical science • Approach: • solve a series of chemical analysis problems with various techniques and instruments • certify laboratory instruments and standards • maintain laboratory records in compliance with Good Laboratory Practice Guidelines Schedule: Weeks 1-6 - Perform a Basic Set of 8 fundamental experiments (Series A) Weeks 5-15 Two parallel activities will be sustained: - Perform a series of quantitative studies (Series B) - Calibration of laboratory instruments (Each student or student group will perform each experiment in the B-series.) (Each student or student group will perform the calibration of laboratory instruments __________________________________________________________________ Series A. Basic Quantitative Techniques Introductory Experiments (A-1) Experiment 1 Use of the Analytical Balance (page 727) (A-2) Experiment 2 Use of the Pipet and Buret and Statistical Analysis (page 729) Gravimetric Analysis (A-3) Experiment 3 Gravimetric Determination of Chloride (page 730) Volumetric Analysis Acid-Base Titrations Neutralization Titrations (A-4) Experiment 6 Determination of Replaceable Hydrogen in Acid by Titration with Sodium Hydroxide (page 736) (A-5) Experiment...
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...Global strategy of LG Electronics as a leading Korean company Tomikazu Hiraga Senior research Fellow NLI Research Institute Economic recovery in advanced countries including Japan is still sluggish, although corporate financial performance has been recovering gradually. And companies whose business activities in emerging countries experiencing an economic boom account for a larger proportion tend to show better financial performance. Leading Korean companies have a larger presence in the world market and attract considerable attention. I will focus on LG Electronics, Inc., a leading company ranking with Samsung Electronics Co., Ltd. in the world’s electrical and electronics industries, with the largest market share in home appliances markets in important emerging countries, such as India, Brazil, and Indonesia, and relatively advanced management methods including corporate governance, which are highly valued, and will discuss features or important points of its global management and personnel strategy in this article. (Reference: Exchange rates as of August 5, 2010 were as follows. The Japanese yen/Korean won foreign exchange rate was approximately ¥0.074 to the Korean won. The Japanese yen/Indian rupee rate was approximately ¥1.87 to the Indian rupee. ) Leading Korean zaibatsu—The LG group The Korean zaibatsu (chaebol), a unique large companies group, is very influential in Korea’s corporate sector. Top 28 companies by market capitalization other than public corporations account...
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...Global strategy of LG Electronics as a leading Korean company Tomikazu Hiraga Senior research Fellow NLI Research Institute Economic recovery in advanced countries including Japan is still sluggish, although corporate financial performance has been recovering gradually. And companies whose business activities in emerging countries experiencing an economic boom account for a larger proportion tend to show better financial performance. Leading Korean companies have a larger presence in the world market and attract considerable attention. I will focus on LG Electronics, Inc., a leading company ranking with Samsung Electronics Co., Ltd. in the world’s electrical and electronics industries, with the largest market share in home appliances markets in important emerging countries, such as India, Brazil, and Indonesia, and relatively advanced management methods including corporate governance, which are highly valued, and will discuss features or important points of its global management and personnel strategy in this article. (Reference: Exchange rates as of August 5, 2010 were as follows. The Japanese yen/Korean won foreign exchange rate was approximately ¥0.074 to the Korean won. The Japanese yen/Indian rupee rate was approximately ¥1.87 to the Indian rupee. ) Leading Korean zaibatsu—The LG group The Korean zaibatsu (chaebol), a unique large companies group, is very influential in Korea’s corporate sector. Top 28 companies by market capitalization other than public corporations account...
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...LG targets to improve market share in home entertainment segment Published on: April 26, 2011 - 23:46 More in: * Business MUMBAI: Buoyed by surging income levels in the country, Korean consumer durables manufacturer, LG Electronics, is eyeing a 32 per cent market share in home entertainment products and Rs 20,000-crore revenue (from India) by end-this year. “Presently, we have a 29 per cent market share in home entertainment products in India and expect to up it to 32 per cent by December 2011,” LG Electronics India’s managing director, Mr Soon Kwon, told PTI here. “We are targeting around Rs20,000-crore revenue by end-2011 as against Rs 16,000-crore last year. We are growing fast in India and will continue to grow in the market,” he said. LG Electronics India has nine products in the segment and plans to launch more models in this segment in the coming days. “India is one of our key markets. Every year, we are launching some (new) models of home entertainment products in India. We will continue to launch more models in the coming days,” he said. Around 20 per cent of the company’s revenue comes from rural India and it plans to increase this by beefing-up its distribution by opening more outlets, he said. Presently, the company has 20,000 outlets pan-India. LG Electronics competes with Samsung, Philips and Whirlpool in the domestic market. India contributes 6 per cent to the company’s global revenue, he said, adding, “we expect it to double to 12 per cent in...
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...1.0 Introduction of LG Electronics Inc. LG Electronics Inc. is a South Korea multinational electronics company which is also known as the global leader and technology innovator in consumer electronics. The LG Company was a merger of two Korean companies, Lucky and Goldstar, from which the “LG” abbreviation was derived. (Mariush,2012) The company’s headquarter is located in Yeouido-dong, Seoul and the flagship subsidiary of the LG Group. LG has a global sales of KRW (Korean Won) 54.26 trillion which is equal to USD 49 billion in the year 2011. The company operates its business with four business units: mobile communication, air conditioning & energy solution, home entertainment and home appliance. (LG, 2012) It has 75 subsidiaries operates around the world that design and manufacture its products. LG is the world’s second largest flat screen television-set maker after Samsung Electronics Co. (Lee, 2012) Home Entertainment The LG Electronics which is also known as the top global players in home entertainment produces flat panel displays, audio players, video products, monitors, commercial displays and security systems for the consumers and also the commercial markets. LG is not only focusing on creating full-features devices but it is also emphasizing on following the technology boundaries to improve the products. Mobile Communication LG has committed to provide the best ever user experience to expand the next generation of communication by inventing new technologies...
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...sample pretreatment and allows very small amounts of the sample. Directly desorbed solvents from intact pharmaceuticals (ca. 1 mg) in the desorption cup (5 mm x 3.8 mm i.d.) were cryofocused at the head of a capillary column prior to a GC/MS analysis. The desorption temperature was set at a point about 20 degrees C higher than the melting point of each sample individually, and held for 3 min. The analytical results using 7 different pharmaceuticals were in agreement with those obtained by direct injection (DI) of the solution, followed by USP XXIII. This proposed TD-GC/MS method was demonstrated to be very useful for the identification and quantification of residual solvents. Furthermore, this method was simple, allowed rapid analysis and gave good repeatability. 2 J Pharm Biomed Anal. 2011 Jan 25;54(2):417-21. doi: 10.1016/j.jpba.2010.09.006. Epub 2010 Sep 15. A general static-headspace gas chromatographic method for determination of residual benzene in oral liquid pharmaceutical products. Liu H, Tang Q, Markovich RJ, Rustum AM. Source Global Quality Services-Analytical Sciences, Merck & Co., Inc., Union, NJ 07083, USA. hui.liu2@merck.com Abstract Sodium benzoate is used in oral liquid pharmaceutical products for its anti-microbial properties. The benzoate salts present in...
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...Equipment Qualification Good Laboratory Practices About About Labcompliance Contact Labcompliance Scope Tax/Bank Information All come with 10+ Best Practice Documents: SOPs, Checklists, Examples Transfer of Analytical Procedures According to the New USP Chapter <1224> With SOPs, templates and examples for easy implementation March 21, 2013 Quality by Design (QbD) for Analytical Method Development and Validation Learn how to design robustness for easy transfer and to avoid OOS situations Recorded, available at any time Validation of Analytical Methods for GLP and Clinical Studies Learn how to design, prepare, conduct and document for FDA compliance Recorded, available at any time Eight Steps for Cost-effective Laboratory Compliance Up-to-date overview, hot topics and trends. Recorded, available at any time Verification of Compendial Methods according to the New USP Chapter <1226> Understand the new risk based approach and and get real world case studies for testing Recorded, available at any time Effective HPLC Method Development and Validation Preparation, conduct and documentation for FDA/EMA Compliance Recorded, available at any time Validation of Analytical Methods and Procedures Conduct and Document for Efficiency and FDA, USP/EP and ISO 17025 Compliance Recorded, available at any time Development and Validation of Stability...
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...Bulk Polymerization of Styrene Bulk polymerization of styrene will be conducted with different initial initiator concentrations. The polymers will be analyzed for their MW and PDI by size exclusion chromatography (SEC) using a calibration curve. The MW dependence on conversion will be investigated. The effect of the initiator concentration on polymer MW will be examined. Materials. Azobisisobutyronitrile (AIBN) and toluene (HPLC) were purchased from Sigma-Aldrich and used as received. Styrene (Sigma-Aldrich) was purified by passing through a silica column to remove inhibitors. CDCl3 was purchased from Cambridge Isotope and was used as received. Methods. Reaction procedure. To a vial charged with freshly purified styrene (10 g) was AIBN (0.7g, 0.35g or 0.17g) added at room temperature. The mixtures are then heated at 80˚C in an oil bath. Seven aliquots of the reaction mixture are removed at fixed time intervals (e.g., 0, 20, 40, 60, 80,100 min, 1 week) and analyzed by 1H NMR spectroscopy for conversion and SEC for polymer MW and PDI. Sample preparation for SEC analysis. An aliquot of the reaction mixture (3mg) is dissolved in THF(1mL) and was filtered through a syringe membrane filter prior to injection into SEC column. Sample preparation for 1H NMR analysis. An aliquot of the reaction mixture (0.1-0.5 mg) is dissolved in CDCl3 (1mL) and is transferred into a NMR tube for conversion analysis. Lab report write-up. Summarize and discuss your experimental...
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...Ada Lovelace was born in London on December 10th, 1815. Her parents were Lord George Gordon Byron and Lady Anne Isabella Milbanke Byron. They didn’t have a happy relationship, and Lady Byron separated from her husband weeks after Ada was born. A few months later, Lord Byron left England, and Ada never saw him again because unfortunately he died in Greece when Ada was 8 years old. Later on in her life, Ada’s mother hired tutors to teach her science and math. She believed that if Ada engaged in these, it would prevent her from developing her father's moody and unpredictable temper. In 1835, Ada married William King. They had three children together. Ada's health suffered after a case of cholera in 1837. Doctors gave her painkillers and her personality...
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...This experiment will separate the components of a mixture on the basis of their differing absorptive tendencies on a stationary phase, which is the method of chromatography. The mobile phase will consist of four distinct transition metal cations dissolved in an acetone-hydrochloric acid eluent, along with three unknown solutions; the identities of these will be determined based on a comparison of the Rf value of these to the known cations. First to be prepared was the stationary phase, or chromatographic paper, which in this case was filter paper. Given only large sheets, it was cut into a rectangle with 20 cm length and 10 cm width. Before cutting, though gloves were put on so that skin oil would not stain the filter paper. Also, the filter paper was not laid on the lab table, but on a paper towel. With a pencil, a line was drawn 2 cm from the bottom edge of the paper. Marks were put on the line, 2 cm apart, and labeled with the appropriate cations and the unknowns labeled as U1, U2, and U3. The stationary phases were then spotted with the corresponding knowns and unknowns, then dried under a heat lamp. This spotting process was repeated 3 times. It was done using glass capillary tubes; these used adhesive and cohesive forces to draw up the cation solutions into the tube and subsequently released them onto the filter paper when touch. With the stationary prepared, the developing chamber was made. In a 600-ml beaker 9 ml of acetone and 1ml of 6 M HCl were combined (under...
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...Gunshot Residue Analysis You are provided with cotton balls that were used to swab 2 suspect’s hands for the presence of gunshot residue. Determine, by atomic absorption spectroscopy, if either of the 2 have fired a gun recently. To do this you will first extract the lead residue off of the cotton ball and then you will run the lead samples and a lead positive sample and a blank to determine if there is lead in the residue from the suspect’s hands. Extraction/Sample Prep: 1.) Use tweezers or forceps to remove the cotton ball from its container and place it into a plastic centrifuge tube. Add 10 mL of 1% nitric acid and shake well. Continue shaking occasionally for 10 minutes. 2.) Remove the supernatant (the liquid in the tube) with a transfer pipet and place it into a labeled 25 mL volumetric flask. 3.) Add 1 mL of Ammonium dihydrogen phosphate solution. 4.) Dilute the contents of the flask with 1% nitric acid. 5.) Label the flask(s) as unknowns (1,2). Positive and negative control samples: 1.) Add 1 mL of lead standard to a 25 mL volumetric flask. 2.) Add 1 mL of Ammonium dihydrogen phosphate solution. 3.) Dilute the contents of the flask with 1% nitric acid. 4.) Label the flask as positive control #1 5.) Add 0.5 mL of lead standard to a 25 mL volumetric flask. 6.) Add 1 mL of Ammonium dihydrogen phosphate solution. 7.) Dilute the contents of the flask with 1% nitric acid. 8.) Label the flask as positive control #2 9.) Add 1 mL of Ammonium dihydrogen phosphate solution. 10.)...
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...Representing Repression: A Psychological Reading of Menagerie Shih Ching-liang The Glass As the tradition of realism dominated in the late 19th century, expressionism emerged along with the rise of psychology at the very end of the century Expressionistic plays sought to give not the external reality or surface appearance of life but the inner reality, life as felt rather than as seen (Barnet 519). The Glass Menagerie is mostly expressionistic: the first sentence of the Production Notes declares that “it is a memory play.” The term “memory play” suggests that it is a play worked out in one’s mental process, rather than a realistic representation. Instead of external reality, the inner vision becomes the primary concern of expressionistic drama. Thus this paper focuses on the repressed state of each character in the Wingfield family, and tries to shed light on their inner psychology by means of psychoanalytical approach. As a mother figure, Amanda is quite distinctive from those in conventional drama. With the father absent for years, Amanda takes on not only maternal nuturing responsibilities but also the paternal disciplinary role. She is a breadwinner (though partly) as well as a caretaker. Yet in her attempt to fulfill this double-sided role, she actually encounters a series of frustrations and repressions, which provoke her to escape into the retreat of past. In the play, what characterizes Amanda is her poignant sentiment toward the Old South days. She believes in the...
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...Statement of Goals The goal of the group project was to calculate the percent calcium in a natural calcium tablet from Prime Eastern Pharmaceuticals in order to compare it with the reported amount of 800 mg of calcium per tablet to determine the validity of complaints regarding a reduced amount of mineral in the multivitamin. The quantitative determination of the analyte was accomplished through three experiments: complexometric titrimetry, flame atomic absorption analysis, and potentiometry using an Ion Selective Electrode. The complexometric titrimetry involved titrating the unknown calcium solution made from the calcium tablet with standardized EDTA. Quantitative determination of the analyte calcium was possible due to the stable and quick formation of the metal-EDTA complex with a 1:1 reaction stoichiometry. Flame atomic absorption analysis is useful in determining the amount of analyte in an unknown because the measure absorbances of standard solutions can be used to plot a calibration curve that can be used to determine the concentration of the metal in an unknown solution. Potentiometry is useful for determination of analyte when an ion sensitive electrode is used to find the amount of ion in standard solutions. Week 1: Introduction and Background The first test for calcium in the multivitamin was complexometric titrimetry, a titration of a solution of calcium tablet with a standardized solution of EDTA. EDTA forms a stable complex with calcium metal with a reaction...
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...Chromatography is commonly used to separate mixtures to determine different chemical components. The main types of chromatography include gas, thin layer, paper and column chromatography. Generally used most, paper has a stationery phase and a mobile phase in a chromatographical experiment. The stationery phase is the paper itself absorbing the solvent, while the mobile phase is the solute moving up the strip of paper. Solvents are solids, liquids or gasses that dissolve the solute, in this instance it separates the pigments of the ink so you can see what colours make the solute. (ABC, 2018) Each solvent has a different structure based on their dielectric constant. The solvents being used in this experiment are acetone, acetic acid (5%) and water. The dielectric constant states how polar each solvent is, showing whether or not it will have a better reaction with the inks tested. The measurement of the solute and the solvent is calculated in this equation: The Rf value (retention value) is the distance at which the solute has travelled (Mobile phase). This is a useful technique as it can determine the polarities of the solvents. Determining whether the solvents are polar or non-polar is through their chemical structure and electronegativity charges. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. (Clark, 2000) Firstly, if the electronegativity difference is greater than 0.5, then it is considered as a polar bond and if it below...
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...Maria Vasilenko 223901 Feasibility of using biosensors for heavy metal detection in complex matrices such as bio-slurries. Master of Science Thesis Examiners: Professor Matti Karp Professor Raghida Lepistö Examiner and topic approved in The Science and Bioengineering Department Council meeting on 7.11.2012 Abstract TAMPERE UNIVERSITY OF TECHNOLOGY Master‟s Degree Programme in Science and Bioengineering Vasilenko Maria: Feasibility of using biosensors for heavy metal detection in complex matrices such as bio-slurries. Seminar paper, 97 pages November 2012 Major: Biotechnology Examiners: Matti Karp, Raghida Lepisto Keywords: environmental pollution, heavy metals, biosensors, slurries The quality of bioslurries that are used in industrial production and agriculture need to be watched very closely to avoid spreading of contaminants on area and poisoning of humans and animals. Because heavy metals are very stable and toxic in many chemical compositions, their amount should be estimated very thoroughly. A new approach that involved biosensors was tested in this study. Because the slurries are complex non-unified matrices which composed of two phases – solid and liquid, the cell behavior can varies a lot from the one that explained in water and so the estimation of ion concentration can be not reliable. It was shown that the cell actually behave different in the slurries. Normally the dissolved compounds suppress the biosensor activity and, in the same time, the ions in the...
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